1
|
Zheng M, Zhang Y, Wang S, Yang J, Guan P, Zhang B, Fan H, Yan S, Ni H, Yang C. Effects of electric field and light on resistivity switching of Eu 0.7Sr 0.3MnO 3 thin films. Phys Chem Chem Phys 2024; 26:4968-4974. [PMID: 38230694 DOI: 10.1039/d3cp05256g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Based on the excellent piezoelectric properties of 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) single crystals, a hole-doped manganite film/PMN-PT heterostructure has been constructed to achieve electric-field and light co-control of physical properties. Here, we report the resistivity switching behavior of Eu0.7Sr0.3MnO3/PMN-PT(111) multiferroic heterostructures under different in-plane reading currents, temperatures, light stimuli and electric fields, and discuss the underlying coupling mechanisms of resistivity change. The transition from the electric-field induced lattice strain effect to polarization current effect can be controlled effectively by decreasing the in-plane reading current at room temperature. With the decrease of temperature, the interfacial charge effect dominates over the lattice strain effect due to the reduced charge carrier density. In addition, light stimulus can lead to the delocalization of eg carriers, and thus enhance the lattice strain effect and suppress the interfacial charge effect. This work helps to understand essential physics of magnetoelectric coupling and also provides a potential method to realize energy-efficient multi-field control of manganite thin films.
Collapse
Affiliation(s)
- Ming Zheng
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China.
- Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
- Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
| | - Yixiao Zhang
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China.
| | - Shengnan Wang
- College of Science, China University of Petroleum (East China), Qingdao 266580, China
| | - Jian Yang
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China.
| | - Pengfei Guan
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China.
| | - Baojing Zhang
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China.
| | - Heliang Fan
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China.
| | - Shiguang Yan
- Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Hao Ni
- College of Science, China University of Petroleum (East China), Qingdao 266580, China
| | - Chang Yang
- Key Laboratory of Polar Materials and Devices (MOE), Shanghai Center of Brain-inspired Intelligent Materials and Devices, and Department of Electronics, East China Normal University, Shanghai, 200241, China
| |
Collapse
|
2
|
Li D, Wang H, Li K, Zhu B, Jiang K, Backes D, Veiga LSI, Shi J, Roy P, Xiao M, Chen A, Jia Q, Lee TL, Dhesi SS, Scanlon DO, MacManus-Driscoll JL, van Aken PA, Zhang KHL, Li W. Emergent and robust ferromagnetic-insulating state in highly strained ferroelastic LaCoO 3 thin films. Nat Commun 2023; 14:3638. [PMID: 37336926 PMCID: PMC10279738 DOI: 10.1038/s41467-023-39369-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 06/09/2023] [Indexed: 06/21/2023] Open
Abstract
Transition metal oxides are promising candidates for the next generation of spintronic devices due to their fascinating properties that can be effectively engineered by strain, defects, and microstructure. An excellent example can be found in ferroelastic LaCoO3 with paramagnetism in bulk. In contrast, unexpected ferromagnetism is observed in tensile-strained LaCoO3 films, however, its origin remains controversial. Here we simultaneously reveal the formation of ordered oxygen vacancies and previously unreported long-range suppression of CoO6 octahedral rotations throughout LaCoO3 films. Supported by density functional theory calculations, we find that the strong modification of Co 3d-O 2p hybridization associated with the increase of both Co-O-Co bond angle and Co-O bond length weakens the crystal-field splitting and facilitates an ordered high-spin state of Co ions, inducing an emergent ferromagnetic-insulating state. Our work provides unique insights into underlying mechanisms driving the ferromagnetic-insulating state in tensile-strained ferroelastic LaCoO3 films while suggesting potential applications toward low-power spintronic devices.
Collapse
Affiliation(s)
- Dong Li
- College of Physics, MIIT Key Laboratory of Aerospace Information Materials and Physics, State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, 211106, Nanjing, China
| | - Hongguang Wang
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany.
| | - Kaifeng Li
- College of Physics, MIIT Key Laboratory of Aerospace Information Materials and Physics, State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, 211106, Nanjing, China
| | - Bonan Zhu
- Department of Chemistry, University College London, London, WC1H 0AJ, UK.
| | - Kai Jiang
- Department of Materials, East China Normal University, 200241, Shanghai, China.
- School of Arts and Sciences, Shanghai Dianji University, 200240, Shanghai, China.
| | - Dirk Backes
- Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Larissa S I Veiga
- Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Jueli Shi
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Pinku Roy
- Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA
- Department of Materials Design and Innovation, University at Buffalo-The State University of New York, Buffalo, NY, 14260, USA
| | - Ming Xiao
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
| | - Aiping Chen
- Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA
| | - Quanxi Jia
- Department of Materials Design and Innovation, University at Buffalo-The State University of New York, Buffalo, NY, 14260, USA
| | - Tien-Lin Lee
- Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Sarnjeet S Dhesi
- Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - David O Scanlon
- Department of Chemistry, University College London, London, WC1H 0AJ, UK
- Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | | | - Peter A van Aken
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany
| | - Kelvin H L Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China.
| | - Weiwei Li
- College of Physics, MIIT Key Laboratory of Aerospace Information Materials and Physics, State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, 211106, Nanjing, China.
| |
Collapse
|
3
|
Zhou G, Ji H, Yan Z, Kang P, Li Z, Xu X. Dimensionality control of magnetic coupling at interfaces of cuprate-manganite superlattices. MATERIALS HORIZONS 2021; 8:2485-2493. [PMID: 34870305 DOI: 10.1039/d1mh00790d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The dimensionality of the crystal structure plays a vital role in artificial heterostructures composed of different transition metal oxides. Nonlinear layer-thickness dependence of the exchange bias effect was observed in high-quality SrCuO2/La0.7Sr0.3MnO (LSMO) superlattices induced in the present work by dimensional evolution. In the SCO(n)/LSMO(8) superlattices with thickness below the critical value (5 u.c.), the exchange bias effect decreased and the saturated magnetization increased with increase in SCO thickness. By contrast, the exchange bias effect increased and the saturated magnetization decreased in S(n)L(8) superlattices with thickness above the critical value. This is because the lattice SCO material underwent a breathing-like structural transformation from the planar to a chain-like structure. The results indicate the interfacial superexchange coupling mainly present in the chain-like S(n)L(8) superlattices through X-ray absorption spectroscopy and first principles calculations. This superexchange coupling generated a weak localized magnetic moment to pin the adjacent ferromagnetic layer. However, in the thicker S(n)L(8) superlattices, evolution of magnetic properties was induced by the long-range antiferromagnetic order in the planar SCO layer. Our findings demonstrate that the dimensionality driven structural variation is an effective method to manipulate the electronic reconstruction and the associated physical properties, paving a pathway for the advancement of strongly correlated materials.
Collapse
Affiliation(s)
- Guowei Zhou
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen 041004, China.
- Research Institute of Materials Science of Shanxi Normal University & Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology, Linfen 041004, China.
| | - Huihui Ji
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen 041004, China.
| | - Zhi Yan
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen 041004, China.
| | - Penghua Kang
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen 041004, China.
| | - Zhilan Li
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen 041004, China.
| | - Xiaohong Xu
- School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Linfen 041004, China.
- Research Institute of Materials Science of Shanxi Normal University & Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology, Linfen 041004, China.
| |
Collapse
|
4
|
Lin S, Zhang Q, Sang X, Zhao J, Cheng S, Huon A, Jin Q, Chen S, Chen S, Cui W, Guo H, He M, Ge C, Wang C, Wang J, Fitzsimmons MR, Gu L, Zhu T, Jin K, Guo EJ. Dimensional Control of Octahedral Tilt in SrRuO 3 via Infinite-Layered Oxides. NANO LETTERS 2021; 21:3146-3154. [PMID: 33750141 DOI: 10.1021/acs.nanolett.1c00352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Manipulation of octahedral distortion at atomic scale is an effective means to tune the ground states of functional oxides. Previous work demonstrates that strain and film thickness are variable parameters to modify the octahedral parameters. However, selective control of bonding geometry by structural propagation from adjacent layers is rarely studied. Here we propose a new route to tune the ferromagnetism in SrRuO3 (SRO) ultrathin layers by oxygen coordination of adjacent SrCuO2 (SCO) layers. The infinite-layered CuO2 exhibits a structural transformation from "planar-type" to "chain-type" with reduced film thickness. Two orientations dramatically modify the polyhedral connectivity at the interface, thus altering the octahedral distortion of SRO. The local structural variation changes the spin state of Ru and orbital hybridization strength, leading to a significant change in the magnetoresistance and anomalous Hall resistivity. These findings could launch investigations into adaptive control of functionalities in quantum oxide heterostructures using oxygen coordination.
Collapse
Affiliation(s)
- Shan Lin
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiahan Sang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and Nanostructure Research Center, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China
| | - Jiali Zhao
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Sheng Cheng
- Spallation Neutron Source Science Center, Dongguan 523803, China
| | - Amanda Huon
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Qiao Jin
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Shuang Chen
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Shengru Chen
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Wenjun Cui
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and Nanostructure Research Center, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China
| | - Haizhong Guo
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Meng He
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Chen Ge
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Can Wang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Jiaou Wang
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Michael R Fitzsimmons
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Tao Zhu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Spallation Neutron Source Science Center, Dongguan 523803, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Kuijuan Jin
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Er-Jia Guo
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| |
Collapse
|
5
|
Kelley KP, Sharma V, Zhang W, Baddorf AP, Nascimento VB, Vasudevan RK. Exotic Long-Range Surface Reconstruction on La 0.7Sr 0.3MnO 3 Thin Films. ACS APPLIED MATERIALS & INTERFACES 2021; 13:9166-9173. [PMID: 33566561 DOI: 10.1021/acsami.0c20166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Due to an extremely diverse phase space, La1-xSrxMnO3, as with other manganites, offers a wide range of tunability and applications including colossal magnetoresistance and use as spin-polarized electrodes. Here, we study an unprecedented, exotic surface reconstruction (6 × 6) in La1-xSrxMnO3 (x = 0.3) observed via low-energy electron diffraction (LEED). Scanning tunneling microscopy (STM) shows the surface is relatively flat, with unit-cell step heights, and X-ray photoelectron spectroscopy (XPS) reveals a strong degree of Sr segregation at the surface. By combining electron diffraction and first-principles computations, we propose that the long-range surface reconstruction consists of a Sr-segregated surface with La (6 × 6) ordering. This study expands our understanding of manganite systems and underscores their ability to form interesting surface reconstructions, driven largely by cation segregation that can potentially be controlled for tuning surface ordering.
Collapse
Affiliation(s)
- Kyle P Kelley
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Vinit Sharma
- National Institute for Computational Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Joint Institute for Computational Sciences, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Wenrui Zhang
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Arthur P Baddorf
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Von B Nascimento
- Departamento de Física, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Rama K Vasudevan
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| |
Collapse
|
6
|
Chen B, Gauquelin N, Green RJ, Lee JH, Piamonteze C, Spreitzer M, Jannis D, Verbeeck J, Bibes M, Huijben M, Rijnders G, Koster G. Spatially Controlled Octahedral Rotations and Metal-Insulator Transitions in Nickelate Superlattices. NANO LETTERS 2021; 21:1295-1302. [PMID: 33470113 PMCID: PMC7883389 DOI: 10.1021/acs.nanolett.0c03850] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The properties of correlated oxides can be manipulated by forming short-period superlattices since the layer thicknesses are comparable with the typical length scales of the involved correlations and interface effects. Herein, we studied the metal-insulator transitions (MITs) in tetragonal NdNiO3/SrTiO3 superlattices by controlling the NdNiO3 layer thickness, n in the unit cell, spanning the length scale of the interfacial octahedral coupling. Scanning transmission electron microscopy reveals a crossover from a modulated octahedral superstructure at n = 8 to a uniform nontilt pattern at n = 4, accompanied by a drastically weakened insulating ground state. Upon further reducing n the predominant dimensionality effect continuously raises the MIT temperature, while leaving the antiferromagnetic transition temperature unaltered down to n = 2. Remarkably, the MIT can be enhanced by imposing a sufficiently large strain even with strongly suppressed octahedral rotations. Our results demonstrate the relevance for the control of oxide functionalities at reduced dimensions.
Collapse
Affiliation(s)
- Binbin Chen
- MESA+
Institute for Nanotechnology, University
of Twente, 7500 AE Enschede, The Netherlands
| | - Nicolas Gauquelin
- Electron
Microscopy for Materials Science (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Robert J. Green
- Department
of Physics and Engineering Physics, University
of Saskatchewan, 116 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
- Stewart
Blusson Quantum Matter Institute, University
of British Columbia, 111-2355 E Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Jin Hong Lee
- Unité
Mixte de Physique, CNRS, Thales, Univ. Paris-Sud,
Université Paris-Saclay, 91767 Palaiseau, France
| | - Cinthia Piamonteze
- Swiss Light
Source, Paul Scherrer Institute, PSI, 5232 Villigen, Switzerland
| | - Matjaž Spreitzer
- Advanced
Materials Department, Jožef Stefan
Institute, 1000 Ljubljana, Slovenia
| | - Daen Jannis
- Electron
Microscopy for Materials Science (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Johan Verbeeck
- Electron
Microscopy for Materials Science (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Manuel Bibes
- Unité
Mixte de Physique, CNRS, Thales, Univ. Paris-Sud,
Université Paris-Saclay, 91767 Palaiseau, France
| | - Mark Huijben
- MESA+
Institute for Nanotechnology, University
of Twente, 7500 AE Enschede, The Netherlands
| | - Guus Rijnders
- MESA+
Institute for Nanotechnology, University
of Twente, 7500 AE Enschede, The Netherlands
| | - Gertjan Koster
- MESA+
Institute for Nanotechnology, University
of Twente, 7500 AE Enschede, The Netherlands
- (G.K.)
| |
Collapse
|
7
|
Jeong SG, Han G, Song S, Min T, Mohamed AY, Park S, Lee J, Jeong HY, Kim Y, Cho D, Choi WS. Propagation Control of Octahedral Tilt in SrRuO 3 via Artificial Heterostructuring. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001643. [PMID: 32832374 PMCID: PMC7435247 DOI: 10.1002/advs.202001643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 05/11/2020] [Indexed: 05/25/2023]
Abstract
Bonding geometry engineering of metal-oxygen octahedra is a facile way of tailoring various functional properties of transition metal oxides. Several approaches, including epitaxial strain, thickness, and stoichiometry control, have been proposed to efficiently tune the rotation and tilt of the octahedra, but these approaches are inevitably accompanied by unnecessary structural modifications such as changes in thin-film lattice parameters. In this study, a method to selectively engineer the octahedral bonding geometries is proposed, while maintaining other parameters that might implicitly influence the functional properties. A concept of octahedral tilt propagation engineering is developed using atomically designed SrRuO3/SrTiO3 (SRO/STO) superlattices. In particular, the propagation of RuO6 octahedral tilt within the SRO layers having identical thicknesses is systematically controlled by varying the thickness of adjacent STO layers. This leads to a substantial modification in the electromagnetic properties of the SRO layer, significantly enhancing the magnetic moment of Ru. This approach provides a method to selectively manipulate the bonding geometry of strongly correlated oxides, thereby enabling a better understanding and greater controllability of their functional properties.
Collapse
Affiliation(s)
- Seung Gyo Jeong
- Department of PhysicsSungkyunkwan UniversitySuwon16419Republic of Korea
| | - Gyeongtak Han
- Department of Energy SciencesSungkyunkwan UniversitySuwon16419Korea
- Center for Integrated Nanostructure PhysicsInstitute for Basic ScienceSuwon16419Korea
| | - Sehwan Song
- Department of PhysicsPusan National UniversityBusan46241Korea
| | - Taewon Min
- Department of PhysicsPusan National UniversityBusan46241Korea
| | - Ahmed Yousef Mohamed
- IPIT and Department of PhysicsJeonbuk National UniversityJeonju54896Republic of Korea
| | - Sungkyun Park
- Department of PhysicsPusan National UniversityBusan46241Korea
| | - Jaekwang Lee
- Department of PhysicsPusan National UniversityBusan46241Korea
| | - Hu Young Jeong
- UNIST Central Research Facilities and School of Materials Science and EngineeringUlsan National Institute of Science and TechnologyUlsan44919Korea
| | - Young‐Min Kim
- Department of Energy SciencesSungkyunkwan UniversitySuwon16419Korea
- Center for Integrated Nanostructure PhysicsInstitute for Basic ScienceSuwon16419Korea
| | - Deok‐Yong Cho
- IPIT and Department of PhysicsJeonbuk National UniversityJeonju54896Republic of Korea
| | - Woo Seok Choi
- Department of PhysicsSungkyunkwan UniversitySuwon16419Republic of Korea
| |
Collapse
|
8
|
Li W, Zhu B, He Q, Borisevich AY, Yun C, Wu R, Lu P, Qi Z, Wang Q, Chen A, Wang H, Cavill SA, Zhang KHL, MacManus‐Driscoll JL. Interface Engineered Room-Temperature Ferromagnetic Insulating State in Ultrathin Manganite Films. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1901606. [PMID: 31921553 PMCID: PMC6947487 DOI: 10.1002/advs.201901606] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/23/2019] [Indexed: 06/10/2023]
Abstract
Ultrathin epitaxial films of ferromagnetic insulators (FMIs) with Curie temperatures near room temperature are critically needed for use in dissipationless quantum computation and spintronic devices. However, such materials are extremely rare. Here, a room-temperature FMI is achieved in ultrathin La0.9Ba0.1MnO3 films grown on SrTiO3 substrates via an interface proximity effect. Detailed scanning transmission electron microscopy images clearly demonstrate that MnO6 octahedral rotations in La0.9Ba0.1MnO3 close to the interface are strongly suppressed. As determined from in situ X-ray photoemission spectroscopy, O K-edge X-ray absorption spectroscopy, and density functional theory, the realization of the FMI state arises from a reduction of Mn eg bandwidth caused by the quenched MnO6 octahedral rotations. The emerging FMI state in La0.9Ba0.1MnO3 together with necessary coherent interface achieved with the perovskite substrate gives very high potential for future high performance electronic devices.
Collapse
Affiliation(s)
- Weiwei Li
- Department of Materials Science and MetallurgyUniversity of Cambridge27 Charles Babbage RoadCambridgeCB3 0FSUK
| | - Bonan Zhu
- Department of Materials Science and MetallurgyUniversity of Cambridge27 Charles Babbage RoadCambridgeCB3 0FSUK
| | - Qian He
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATUK
| | - Albina Y. Borisevich
- Center for Nanophase Materials SciencesOak Ridge National LaboratoryOak RidgeTN37831USA
| | - Chao Yun
- Department of Materials Science and MetallurgyUniversity of Cambridge27 Charles Babbage RoadCambridgeCB3 0FSUK
| | - Rui Wu
- Department of Materials Science and MetallurgyUniversity of Cambridge27 Charles Babbage RoadCambridgeCB3 0FSUK
| | - Ping Lu
- Sandia National LaboratoryAlbuquerqueNM87185USA
| | - Zhimin Qi
- School of Materials EngineeringPurdue UniversityWest LafayetteIN47907USA
| | - Qiang Wang
- Department of Physics and AstronomyWest Virginia UniversityMorgantownWV26506USA
| | - Aiping Chen
- Center for Integrated NanotechnologiesLos Alamos National LaboratoryLos AlamosNM87545USA
| | - Haiyan Wang
- School of Materials EngineeringPurdue UniversityWest LafayetteIN47907USA
| | - Stuart A. Cavill
- Department of PhysicsUniversity of YorkYorkYO10 5DDUK
- Diamond Light SourceDidcotOX11 0DEUK
| | - Kelvin H. L. Zhang
- State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China
| | - Judith L. MacManus‐Driscoll
- Department of Materials Science and MetallurgyUniversity of Cambridge27 Charles Babbage RoadCambridgeCB3 0FSUK
| |
Collapse
|
9
|
Carreira SJ, Aguirre MH, Briatico J, Steren LB. Nanoscale magnetic and charge anisotropies at manganite interfaces. RSC Adv 2019; 9:38604-38611. [PMID: 35540222 PMCID: PMC9075869 DOI: 10.1039/c9ra06552k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 11/06/2019] [Indexed: 11/23/2022] Open
Abstract
Strong correlated manganites are still under intense research owing to their complex phase diagrams in terms of Sr-doping and their sensitivity to intrinsic and extrinsic structural deformations. Here, we performed X-ray absorption spectroscopy measurements of manganite bilayers to explore the effects that a local Sr-doping gradient produce on the charge and antiferromagnetic anisotropies. In order to gradually tune the Sr-doping level along the axis perpendicular to the samples we have grown a series of bilayers with different thicknesses of low-doped manganites (from 0 nm to 6 nm) deposited over a La0.7Sr0.3MnO3 metallic layer. This strategy permitted us to resolve with high accuracy the thickness region where the charge and spin anisotropies vary and the critical thickness tc over which the out of plane orbital asymmetry does not have any further modifications. We found that the antiferromagnetic spin axis points preferentially out of the sample plane regardless the capping layer thickness. However, it tilts partially into the sample plane far from this critical thickness, owing to the combined contributions of the external structural strain and electron doping. Furthermore, we found that the doping level of the capping layer strongly affects the critical thickness, giving clear evidence of the influence exerted by the electron doping on the orbital and magnetic configurations. These anisotropic changes induce subtle modifications on the domain reorientation of La0.7Sr0.3MnO3, as evidenced from the magnetic hysteresis cycles. Nanoscale variation of antiferromagnetic and charge anisotropies has been found at manganite interfaces with an artificially created Sr-doping.![]()
Collapse
Affiliation(s)
- Santiago J Carreira
- Consejo Nacional de Investigaciones Científicas y Técnicas Argentina +54-11-6772-7103.,Laboratorio de Nanoestructuras Magnéticas y Dispositivos, Dpto. Materia Condensada, Instituto de Nanociencia y Nanotecnología (INN), Centro Atómico Constituyentes (CNEA) 1650 San Martín Buenos Aires Argentina
| | - Myriam H Aguirre
- Instituto de Ciencia de Materiales de Aragón (ICMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza E-50018 Zaragoza Spain +34 976 76 2776 +34 876 55 5365.,Departamento de Física de la Materia Condensada, Universidad de Zaragoza E-50009 Zaragoza Spain.,Laboratorio de Microscopías Avanzadas, Universidad de Zaragoza E-50018 Zaragoza Spain
| | - Javier Briatico
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Sud, Université Paris-Saclay Palaiseau 91767 France
| | - Laura B Steren
- Consejo Nacional de Investigaciones Científicas y Técnicas Argentina +54-11-6772-7103.,Laboratorio de Nanoestructuras Magnéticas y Dispositivos, Dpto. Materia Condensada, Instituto de Nanociencia y Nanotecnología (INN), Centro Atómico Constituyentes (CNEA) 1650 San Martín Buenos Aires Argentina
| |
Collapse
|
10
|
Gao W, Addiego C, Wang H, Yan X, Hou Y, Ji D, Heikes C, Zhang Y, Li L, Huyan H, Blum T, Aoki T, Nie Y, Schlom DG, Wu R, Pan X. Real-space charge-density imaging with sub-ångström resolution by four-dimensional electron microscopy. Nature 2019; 575:480-484. [DOI: 10.1038/s41586-019-1649-6] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 08/06/2019] [Indexed: 11/09/2022]
|
11
|
Lan D, Chen B, Qu L, Jin F, Guo Z, Xu L, Zhang K, Gao G, Chen F, Jin S, Wang L, Wu W. Interfacial Engineering of Ferromagnetism in Epitaxial Manganite/Ruthenate Superlattices via Interlayer Chemical Doping. ACS APPLIED MATERIALS & INTERFACES 2019; 11:10399-10408. [PMID: 30775907 DOI: 10.1021/acsami.8b22055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Interfacial charge transfer and structural proximity effects are the two essential routes to trigger and tune numerous functionalities of perovskite oxide heterostructures. However, the cooperation and competition of these two interfacial effects in one epitaxial system have not been fully understood. Herein, we fabricate a series of La0.67Ca0.33MnO3/CaRuO3 superlattices and introduce various chemical doping in the nonmagnetic CaRuO3 interlayers. We found that Ti, Sr, and La doping in the CaRuO3 layer can effectively tune the interfacial charge transfer and octahedral rotation, thus modulating the ferromagnetism of the superlattices. Specifically, the B-site Ti doping depletes the Ru 4d band and suppresses the interfacial charge transfer, leading to a decay of ferromagnetic Curie temperature ( TC). In contrast, the A-site Sr doping maintains a sizable charge transfer and meanwhile suppresses the octahedral rotation, which facilitates ferromagnetism and significantly enhances the TC up to 291 K. The La doping turns out to localize the itinerant electrons in the CaRuO3 layer, which suppresses both the interfacial charge transfer and ferromagnetism. The observed intriguing interfacial engineering of magnetism would pave a new way to understand the collective effects of interfacial charge transfer and structural proximity on the physical properties of oxide heterostructures.
Collapse
Affiliation(s)
- Da Lan
- Hefei National Laboratory for Physical Sciences at Microscale , University of Science and Technology of China , Hefei 230026 , China
| | - Binbin Chen
- Hefei National Laboratory for Physical Sciences at Microscale , University of Science and Technology of China , Hefei 230026 , China
| | - LiLi Qu
- Hefei National Laboratory for Physical Sciences at Microscale , University of Science and Technology of China , Hefei 230026 , China
| | - Feng Jin
- Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory and Hefei Science Center , Chinese Academy of Sciences , Hefei 230031 , China
| | - Zhuang Guo
- Hefei National Laboratory for Physical Sciences at Microscale , University of Science and Technology of China , Hefei 230026 , China
| | - Liqiang Xu
- Hefei National Laboratory for Physical Sciences at Microscale , University of Science and Technology of China , Hefei 230026 , China
| | - Kexuan Zhang
- Hefei National Laboratory for Physical Sciences at Microscale , University of Science and Technology of China , Hefei 230026 , China
| | - Guanyin Gao
- Hefei National Laboratory for Physical Sciences at Microscale , University of Science and Technology of China , Hefei 230026 , China
| | - Feng Chen
- Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory and Hefei Science Center , Chinese Academy of Sciences , Hefei 230031 , China
| | - Shaowei Jin
- Institute of Physical Science and Information Technology , Anhui University , Hefei 230601 , China
| | - Lingfei Wang
- Hefei National Laboratory for Physical Sciences at Microscale , University of Science and Technology of China , Hefei 230026 , China
| | - Wenbin Wu
- Hefei National Laboratory for Physical Sciences at Microscale , University of Science and Technology of China , Hefei 230026 , China
- Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory and Hefei Science Center , Chinese Academy of Sciences , Hefei 230031 , China
- Institute of Physical Science and Information Technology , Anhui University , Hefei 230601 , China
| |
Collapse
|
12
|
Liu H, Dong Y, Xu D, Karapetrova E, Lee S, Stan L, Zapol P, Zhou H, Fong DD. Dynamic Field Modulation of the Octahedral Framework in Metal Oxide Heterostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1804775. [PMID: 30370580 DOI: 10.1002/adma.201804775] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 09/20/2018] [Indexed: 06/08/2023]
Abstract
Control over the oxygen octahedral framework is widely recognized as key to the design of functional properties in perovskite oxide heterostructures. Although the oxygen octahedral framework can be manipulated during synthesis, the as-grown oxygen octahedra generally remain fixed, preventing the development of adaptive behavior in electronic and ionotronic systems. Here, it is demonstrated that the oxygen octahedral framework can be dynamically and reversibly manipulated by an electric field through the coupling with oxygen vacancies. Studying model WO3 heterostructures during ionic liquid gating with a combination of in situ X-ray scattering and spectroscopy, it is shown that large changes in electronic properties can arise due to the increased flexibility of the octahedral network at high vacancy concentrations. The results describe a generic framework for the construction of dynamic systems and devices with an array of field-tunable properties.
Collapse
Affiliation(s)
- Huajun Liu
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore, 138634, Singapore
| | - Yongqi Dong
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Dongwei Xu
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
- School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Evguenia Karapetrova
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Sungsik Lee
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Liliana Stan
- Center for Nanoscale Materials, Nanoscience and Technology Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Peter Zapol
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Hua Zhou
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Dillon D Fong
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| |
Collapse
|
13
|
Huang Z, Renshaw Wang X, Rusydi A, Chen J, Yang H, Venkatesan T. Interface Engineering and Emergent Phenomena in Oxide Heterostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1802439. [PMID: 30133012 DOI: 10.1002/adma.201802439] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 07/06/2018] [Indexed: 06/08/2023]
Abstract
Complex oxide interfaces have mesmerized the scientific community in the last decade due to the possibility of creating tunable novel multifunctionalities, which are possible owing to the strong interaction among charge, spin, orbital, and structural degrees of freedom. Artificial interfacial modifications, which include defects, formal polarization, structural symmetry breaking, and interlayer interaction, have led to novel properties in various complex oxide heterostructures. These emergent phenomena not only serve as a platform for investigating strong electronic correlations in low-dimensional systems but also provide potentials for exploring next-generation electronic devices with high functionality. Herein, some recently developed strategies in engineering functional oxide interfaces and their emergent properties are reviewed.
Collapse
Affiliation(s)
- Zhen Huang
- NUSNNI-NanoCore, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
| | - Xiao Renshaw Wang
- NUSNNI-NanoCore, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
| | - Andrivo Rusydi
- NUSNNI-NanoCore, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
| | - Jingsheng Chen
- NUSNNI-NanoCore, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
| | - Hyunsoo Yang
- NUSNNI-NanoCore, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
| | - Thirumalai Venkatesan
- NUSNNI-NanoCore, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
| |
Collapse
|
14
|
Bolstad T, Lysne E, Hallsteinsen I, Arenholz E, Österberg UL, Tybell T. Effect of (1 1 1)-oriented strain on the structure and magnetic properties of La 0.7Sr 0.3MnO 3 thin films. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:255702. [PMID: 29757162 DOI: 10.1088/1361-648x/aac468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Using strain, i.e. subtle changes in lattice constant in a thin film induced by the underlying substrate, opens up intriguing new ways to control material properties. We present a study of the effects of strain on structural and ferromagnetic properties of (1 1 1)pc-oriented La0.7Sr0.3MnO3 epitaxial thin films grown on NdGaO3, SrTiO3, and DyScO3 substrates. (The subscript pc denotes the pseudo-cubic symmetry.) The results show that La0.7Sr0.3MnO3 assumes a monoclinic unit cell on NdGaO3 and DyScO3 and a rhombohedral unit cell on SrTiO3. For La0.7Sr0.3MnO3 on NdGaO3 and DyScO3 a uniaxial magnetic anisotropy is found, while La0.7Sr0.3MnO3 on SrTiO3 is magnetically isotropic. The Néel model is used to explain the anisotropy of the thin films on NdGaO3 and SrTiO3, however, for La0.7Sr0.3MnO3 on DyScO3 the effect of octahedral rotations needs to be included through the single ion model. Through examination of the Curie temperature of the strained films we suggest that (1 1 1)-strain has a different effect on the Jahn-Teller splitting of e g and t 2g electron levels than what is seen in (0 0 1)pc-oriented La0.7Sr0.3MnO3 thin films.
Collapse
Affiliation(s)
- T Bolstad
- Department of Electronic Systems, NTNU Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | | | | | | | | | | |
Collapse
|
15
|
Moon EJ, He Q, Ghosh S, Kirby BJ, Pantelides ST, Borisevich AY, May SJ. Structural "δ Doping" to Control Local Magnetization in Isovalent Oxide Heterostructures. PHYSICAL REVIEW LETTERS 2017; 119:197204. [PMID: 29219521 DOI: 10.1103/physrevlett.119.197204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Indexed: 06/07/2023]
Abstract
Modulation and δ-doping strategies, in which atomically thin layers of charged dopants are precisely deposited within a heterostructure, have played enabling roles in the discovery of new physical behavior in electronic materials. Here, we demonstrate a purely structural "δ-doping" strategy in complex oxide heterostructures, in which atomically thin manganite layers are inserted into an isovalent manganite host, thereby modifying the local rotations of corner-connected MnO_{6} octahedra. Combining scanning transmission electron microscopy, polarized neutron reflectometry, and density functional theory, we reveal how local magnetic exchange interactions are enhanced within the spatially confined regions of suppressed octahedral rotations. The combined experimental and theoretical results illustrate the potential to utilize noncharge-based approaches to "doping" in order to enhance or suppress functional properties within spatially confined regions of oxide heterostructures.
Collapse
Affiliation(s)
- E J Moon
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA
| | - Q He
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - S Ghosh
- Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee 37235, USA
- SRM Research Institute and Department of Physics and Nanotechnology, SRM University, Kattankulathur, Tamil Nadu 603203, India
| | - B J Kirby
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - S T Pantelides
- Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - A Y Borisevich
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - S J May
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA
| |
Collapse
|
16
|
Hirai K, Aso R, Ozaki Y, Kan D, Haruta M, Ichikawa N, Kurata H, Shimakawa Y. Melting of Oxygen Vacancy Order at Oxide-Heterostructure Interface. ACS APPLIED MATERIALS & INTERFACES 2017; 9:30143-30148. [PMID: 28791864 DOI: 10.1021/acsami.7b08134] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Modifications in oxygen coordination environments in heterostructures consisting of dissimilar oxides often emerge and lead to unusual properties of the constituent materials. Although lots of attention has been paid to slight modifications in the rigid oxygen octahedra of perovskite-based heterointerfaces, revealing the modification behaviors of the oxygen coordination environments in the heterostructures containing oxides with oxygen vacancies have been challenging. Here, we show that a significant modification in the oxygen coordination environments-melting of oxygen vacancy order-is induced at the heterointerface between SrFeO2.5 (SFO) and DyScO3 (DSO). When an oxygen-deficient perovskite (brownmillerite structure) SrFeO2.5 film grows epitaxially on a perovskite DyScO3 substrate, both FeO6 octahedra and FeO4 tetrahedra in the (101)-oriented SrFeO2.5 thin film connect to ScO6 octahedra in DyScO3. As a consequence of accommodating a structural mismatch, the alternately ordered arrangement of oxygen vacancies is significantly disturbed and reconstructed in the 2 nm thick heterointerface region. The stabilized heterointerface structure consists of Fe3+ octahedra with an oxygen vacancy disorder. The melting of the oxygen vacancy order, which in bulk SrFeO2.5 occurs at 1103 K, is induced at the present heterointerface at ambient temperatures.
Collapse
Affiliation(s)
- Kei Hirai
- Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan
| | - Ryotaro Aso
- Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan
| | - Yusuke Ozaki
- Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan
| | - Daisuke Kan
- Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan
| | - Mitsutaka Haruta
- Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan
| | - Noriya Ichikawa
- Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan
| | - Hiroki Kurata
- Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan
| | - Yuichi Shimakawa
- Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan
- Integrated Research Consortium on Chemical Sciences , Uji, Kyoto 611-0011, Japan
| |
Collapse
|
17
|
Interface-induced multiferroism by design in complex oxide superlattices. Proc Natl Acad Sci U S A 2017; 114:E5062-E5069. [PMID: 28607082 DOI: 10.1073/pnas.1706814114] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Interfaces between materials present unique opportunities for the discovery of intriguing quantum phenomena. Here, we explore the possibility that, in the case of superlattices, if one of the layers is made ultrathin, unexpected properties can be induced between the two bracketing interfaces. We pursue this objective by combining advanced growth and characterization techniques with theoretical calculations. Using prototype La2/3Sr1/3MnO3 (LSMO)/BaTiO3 (BTO) superlattices, we observe a structural evolution in the LSMO layers as a function of thickness. Atomic-resolution EM and spectroscopy reveal an unusual polar structure phase in ultrathin LSMO at a critical thickness caused by interfacing with the adjacent BTO layers, which is confirmed by first principles calculations. Most important is the fact that this polar phase is accompanied by reemergent ferromagnetism, making this system a potential candidate for ultrathin ferroelectrics with ferromagnetic ordering. Monte Carlo simulations illustrate the important role of spin-lattice coupling in LSMO. These results open up a conceptually intriguing recipe for developing functional ultrathin materials via interface-induced spin-lattice coupling.
Collapse
|
18
|
Fowlie J, Gibert M, Tieri G, Gloter A, Íñiguez J, Filippetti A, Catalano S, Gariglio S, Schober A, Guennou M, Kreisel J, Stéphan O, Triscone JM. Conductivity and Local Structure of LaNiO 3 Thin Films. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1605197. [PMID: 28262988 DOI: 10.1002/adma.201605197] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 01/10/2017] [Indexed: 06/06/2023]
Abstract
A marked conductivity enhancement is reported in 6-11 unit cell LaNiO3 thin films. A maximal conductivity is also observed in ab initio calculations for films of the same thickness. In agreement with results from state of the art scanning transmission electron microscopy, the calculations also reveal a differentiated film structure comprising characteristic surface, interior, and heterointerface structures. Based on this observation, a three-element parallel conductor model is considered and leads to the conclusion that the conductivity enhancement for films of 6-11 unit cells, stems from the onset of intercompetition between the three local structures in the film depth.
Collapse
Affiliation(s)
- Jennifer Fowlie
- DQMP, Université de Genève, 24 Quai E.-Ansermet, 1211, Geneva, Switzerland
| | - Marta Gibert
- DQMP, Université de Genève, 24 Quai E.-Ansermet, 1211, Geneva, Switzerland
| | - Giulio Tieri
- DQMP, Université de Genève, 24 Quai E.-Ansermet, 1211, Geneva, Switzerland
- Laboratoire de Physique des Solides, CNRS UMR8502, Université Paris-Sud, 91405, Orsay, France
| | - Alexandre Gloter
- Laboratoire de Physique des Solides, CNRS UMR8502, Université Paris-Sud, 91405, Orsay, France
| | - Jorge Íñiguez
- Materials Research and Technology Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, 4422, Belvaux, Luxembourg
| | - Alessio Filippetti
- Istituto dei Materiali, CNR-IOM and Dipartimento di Fisica, Università di Cagliari, Monserrato, 09042-I, Cagliari, Italy
| | - Sara Catalano
- DQMP, Université de Genève, 24 Quai E.-Ansermet, 1211, Geneva, Switzerland
| | - Stefano Gariglio
- DQMP, Université de Genève, 24 Quai E.-Ansermet, 1211, Geneva, Switzerland
| | - Alexander Schober
- Materials Research and Technology Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, 4422, Belvaux, Luxembourg
| | - Mael Guennou
- Materials Research and Technology Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, 4422, Belvaux, Luxembourg
| | - Jens Kreisel
- Materials Research and Technology Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, 4422, Belvaux, Luxembourg
- Physics and Materials Science Research Unit, University of Luxembourg, 41 Rue du Brill, 4422, Belvaux, Luxembourg
| | - Odile Stéphan
- Laboratoire de Physique des Solides, CNRS UMR8502, Université Paris-Sud, 91405, Orsay, France
| | - Jean-Marc Triscone
- DQMP, Université de Genève, 24 Quai E.-Ansermet, 1211, Geneva, Switzerland
| |
Collapse
|
19
|
Hellman F, Hoffmann A, Tserkovnyak Y, Beach GSD, Fullerton EE, Leighton C, MacDonald AH, Ralph DC, Arena DA, Dürr HA, Fischer P, Grollier J, Heremans JP, Jungwirth T, Kimel AV, Koopmans B, Krivorotov IN, May SJ, Petford-Long AK, Rondinelli JM, Samarth N, Schuller IK, Slavin AN, Stiles MD, Tchernyshyov O, Thiaville A, Zink BL. Interface-Induced Phenomena in Magnetism. REVIEWS OF MODERN PHYSICS 2017; 89:025006. [PMID: 28890576 PMCID: PMC5587142 DOI: 10.1103/revmodphys.89.025006] [Citation(s) in RCA: 192] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
This article reviews static and dynamic interfacial effects in magnetism, focusing on interfacially-driven magnetic effects and phenomena associated with spin-orbit coupling and intrinsic symmetry breaking at interfaces. It provides a historical background and literature survey, but focuses on recent progress, identifying the most exciting new scientific results and pointing to promising future research directions. It starts with an introduction and overview of how basic magnetic properties are affected by interfaces, then turns to a discussion of charge and spin transport through and near interfaces and how these can be used to control the properties of the magnetic layer. Important concepts include spin accumulation, spin currents, spin transfer torque, and spin pumping. An overview is provided to the current state of knowledge and existing review literature on interfacial effects such as exchange bias, exchange spring magnets, spin Hall effect, oxide heterostructures, and topological insulators. The article highlights recent discoveries of interface-induced magnetism and non-collinear spin textures, non-linear dynamics including spin torque transfer and magnetization reversal induced by interfaces, and interfacial effects in ultrafast magnetization processes.
Collapse
Affiliation(s)
- Frances Hellman
- Department of Physics, University of California, Berkeley, Berkeley, California 94720, USA; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Axel Hoffmann
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Yaroslav Tserkovnyak
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - Geoffrey S D Beach
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Eric E Fullerton
- Center for Memory and Recording Research, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0401, USA
| | - Chris Leighton
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Allan H MacDonald
- Department of Physics, University of Texas at Austin, Austin, Texas 78712-0264, USA
| | - Daniel C Ralph
- Physics Department, Cornell University, Ithaca, New York 14853, USA; Kavli Institute at Cornell, Cornell University, Ithaca, New York 14853, USA
| | - Dario A Arena
- Department of Physics, University of South Florida, Tampa, Florida 33620-7100, USA
| | - Hermann A Dürr
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Peter Fischer
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA; Physics Department, University of California, 1156 High Street, Santa Cruz, California 94056, USA
| | - Julie Grollier
- Unité Mixte de Physique CNRS/Thales and Université Paris Sud 11, 1 Avenue Fresnel, 91767 Palaiseau, France
| | - Joseph P Heremans
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio 43210, USA; Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, USA; Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA
| | - Tomas Jungwirth
- Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnicka 10, 162 53 Praha 6, Czech Republic; School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Alexey V Kimel
- Radboud University, Institute for Molecules and Materials, Nijmegen 6525 AJ, The Netherlands
| | - Bert Koopmans
- Department of Applied Physics, Center for NanoMaterials, COBRA Research Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Ilya N Krivorotov
- Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
| | - Steven J May
- Department of Materials Science & Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA
| | - Amanda K Petford-Long
- Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA; Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208, USA
| | - James M Rondinelli
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA
| | - Nitin Samarth
- Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Ivan K Schuller
- Department of Physics and Center for Advanced Nanoscience, University of California, San Diego, La Jolla, California 92093, USA; Materials Science and Engineering Program, University of California, San Diego, La Jolla, California 92093, USA
| | - Andrei N Slavin
- Department of Physics, Oakland University, Rochester, Michigan 48309, USA
| | - Mark D Stiles
- Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6202, USA
| | - Oleg Tchernyshyov
- Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - André Thiaville
- Laboratoire de Physique des Solides, UMR CNRS 8502, Université Paris-Sud, 91405 Orsay, France
| | - Barry L Zink
- Department of Physics and Astronomy, University of Denver, Denver, CO 80208, USA
| |
Collapse
|
20
|
Grutter AJ, Vailionis A, Borchers JA, Kirby BJ, Flint CL, He C, Arenholz E, Suzuki Y. Interfacial Symmetry Control of Emergent Ferromagnetism at the Nanoscale. NANO LETTERS 2016; 16:5647-5651. [PMID: 27472285 DOI: 10.1021/acs.nanolett.6b02255] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The emergence of complex new ground states at interfaces has been identified as one of the most promising routes to highly tunable nanoscale materials. Despite recent progress, isolating and controlling the underlying mechanisms behind these emergent properties remains among the most challenging materials physics problems to date. In particular, generating ferromagnetism localized at the interface of two nonferromagnetic materials is of fundamental and technological interest. Moreover, the ability to turn the ferromagnetism on and off would shed light on the origin of such emergent phenomena and is promising for spintronic applications. We demonstrate that ferromagnetism confined within one unit cell at the interface of CaRuO3 and CaMnO3 can be switched on and off by changing the symmetry of the oxygen octahedra connectivity at the boundary. Interfaces that are symmetry-matched across the boundary exhibit interfacial CaMnO3 ferromagnetism while the ferromagnetism at symmetry-mismatched interfaces is suppressed. We attribute the suppression of ferromagnetic order to a reduction in charge transfer at symmetry-mismatched interfaces, where frustrated bonding weakens the orbital overlap. Thus, interfacial symmetry is a new route to control emergent ferromagnetism in materials such as CaMnO3 that exhibit antiferromagnetism in bulk form.
Collapse
Affiliation(s)
- A J Grutter
- Geballe Laboratory for Advanced Materials, Stanford University , Stanford, California 94305, United States
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg, Maryland 20899, United States
- Department of Materials Science and Engineering, University of California , Berkeley, California 94720, United States
| | - A Vailionis
- Geballe Laboratory for Advanced Materials, Stanford University , Stanford, California 94305, United States
| | - J A Borchers
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg, Maryland 20899, United States
| | - B J Kirby
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg, Maryland 20899, United States
| | - C L Flint
- Geballe Laboratory for Advanced Materials, Stanford University , Stanford, California 94305, United States
- Department of Materials Science and Engineering, Stanford University , Stanford, California 94305, United States
| | - C He
- Department of Materials Science and Engineering, University of California , Berkeley, California 94720, United States
| | - E Arenholz
- Advanced Light Source, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Y Suzuki
- Geballe Laboratory for Advanced Materials, Stanford University , Stanford, California 94305, United States
- Department of Applied Physics, Stanford University , Stanford, California 94305, United States
| |
Collapse
|
21
|
Lu XZ, Rondinelli JM. Epitaxial-strain-induced polar-to-nonpolar transitions in layered oxides. NATURE MATERIALS 2016; 15:951-955. [PMID: 27295100 DOI: 10.1038/nmat4664] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 05/13/2016] [Indexed: 06/06/2023]
Abstract
Epitaxial strain can induce collective phenomena and new functionalities in complex oxide thin films. Strong coupling between strain and polar lattice modes can stabilize new ferroelectric phases from nonpolar dielectrics or enhance electric polarizations and Curie temperatures. Recently, strain has also been exploited to induce novel metal-insulator transitions and magnetic reconstructions through its coupling to nonpolar modes, including rotations of BO6 transition-metal octahedra. Although large strains are thought to induce ferroelectricity, here we demonstrate a polar-to-nonpolar transition in (001) films of layered A3B2O7 hybrid-improper ferroelectrics with experimentally accessible biaxial strains. We show the origin of the transition originates from the interplay of trilinear-related lattice mode interactions active in the layered oxides, and those interactions are directly strain tunable. Our results call for a careful re-examination of the role of strain-polarization coupling in ferroelectric films with nontrivial anharmonicities and offer a route to search for new functionalities in layered oxides.
Collapse
Affiliation(s)
- Xue-Zeng Lu
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA
| | - James M Rondinelli
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA
| |
Collapse
|
22
|
Kan D, Aso R, Sato R, Haruta M, Kurata H, Shimakawa Y. Tuning magnetic anisotropy by interfacially engineering the oxygen coordination environment in a transition metal oxide. NATURE MATERIALS 2016; 15:432-7. [PMID: 26950594 DOI: 10.1038/nmat4580] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 01/22/2016] [Indexed: 05/27/2023]
Abstract
Strong correlations between electrons, spins and lattices--stemming from strong hybridization between transition metal d and oxygen p orbitals--are responsible for the functional properties of transition metal oxides. Artificial oxide heterostructures with chemically abrupt interfaces provide a platform for engineering bonding geometries that lead to emergent phenomena. Here we demonstrate the control of the oxygen coordination environment of the perovskite, SrRuO3, by heterostructuring it with Ca0.5Sr0.5TiO3 (0-4 monolayers thick) grown on a GdScO3 substrate. We found that a Ru-O-Ti bond angle of the SrRuO3 /Ca0.5Sr0.5TiO3 interface can be engineered by layer-by-layer control of the Ca0.5Sr0.5TiO3 layer thickness, and that the engineered Ru-O-Ti bond angle not only stabilizes a Ru-O-Ru bond angle never seen in bulk SrRuO3, but also tunes the magnetic anisotropy in the entire SrRuO3 layer. The results demonstrate that interface engineering of the oxygen coordination environment allows one to control additional degrees of freedom in functional oxide heterostructures.
Collapse
Affiliation(s)
- Daisuke Kan
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Ryotaro Aso
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Riko Sato
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Mitsutaka Haruta
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Hiroki Kurata
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Yuichi Shimakawa
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
- Japan Science and Technology Agency, CREST, Uji, Kyoto 611-0011, Japan
| |
Collapse
|
23
|
He Q, Ishikawa R, Lupini AR, Qiao L, Moon EJ, Ovchinnikov O, May SJ, Biegalski MD, Borisevich AY. Towards 3D Mapping of BO6 Octahedron Rotations at Perovskite Heterointerfaces, Unit Cell by Unit Cell. ACS NANO 2015; 9:8412-8419. [PMID: 26174591 DOI: 10.1021/acsnano.5b03232] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The rich functionalities in the ABO3 perovskite oxides originate, at least in part, from the ability of the corner-connected BO6 octahedral network to host a large variety of cations through distortions and rotations. Characterizing these rotations, which have significant impact on both fundamental aspects of materials behavior and possible applications, remains a major challenge at heterointerfaces. In this work, we have developed a unique method to investigate BO6 rotation patterns in complex oxides ABO3 with unit cell resolution at heterointerfaces, where novel properties often emerge. Our method involves column shape analysis in ABF-STEM images of the ABO3 heterointerfaces taken in specific orientations. The rotating phase of BO6 octahedra can be identified for all three spatial dimensions without the need of case-by-case simulation. In several common rotation systems, quantitative measurements of all three rotation angles are now possible. Using this method, we examined interfaces between perovskites with distinct tilt systems as well as interfaces between tilted and untilted perovskites, identifying an unusual coupling behavior at the CaTiO3/LSAT interface. We believe this method will significantly improve our knowledge of complex oxide heterointerfaces.
Collapse
Affiliation(s)
| | - Ryo Ishikawa
- Institute of Engineering Innovation, The University of Tokyo , 2-11-16, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | | | | | - Eun J Moon
- Department of Materials Science and Engineering, Drexel University , Philadelphia, Pennsylvania 19104, United States
| | - Oleg Ovchinnikov
- Department of Physics and Astronomy, Vanderbilt University , Nashville, Tennessee 37240, United States
| | - Steven J May
- Department of Materials Science and Engineering, Drexel University , Philadelphia, Pennsylvania 19104, United States
| | | | | |
Collapse
|