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Luo Z, Yu Z, Lu X, Niu W, Yu Y, Yao Y, Tian F, Tan CL, Sun H, Gao L, Qin W, Xu Y, Zhao Q, Song XX. Van der Waals Magnetic Electrode Transfer for Two-Dimensional Spintronic Devices. Nano Lett 2024. [PMID: 38728596 DOI: 10.1021/acs.nanolett.4c01885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2024]
Abstract
Two-dimensional (2D) materials are promising candidates for spintronic applications. Maintaining their atomically smooth interfaces during integration of ferromagnetic (FM) electrodes is crucial since conventional metal deposition tends to induce defects at the interfaces. Meanwhile, the difficulties in picking up FM metals with strong adhesion and in achieving conductance match between FM electrodes and spin transport channels make it challenging to fabricate high-quality 2D spintronic devices using metal transfer techniques. Here, we report a solvent-free magnetic electrode transfer technique that employs a graphene layer to assist in the transfer of FM metals. It also serves as part of the FM electrode after transfer for optimizing spin injection, which enables the realization of spin valves with excellent performance based on various 2D materials. In addition to two-terminal devices, we demonstrate that the technique is applicable for four-terminal spin valves with nonlocal geometry. Our results provide a promising future of realizing 2D spintronic applications using the developed magnetic electrode transfer technique.
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Affiliation(s)
- Zhongzhong Luo
- College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), State Key Laboratory of Organic Electronics and Information Displays, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
- Guangdong Greater Bay Area Institute of Integrated Circuit and System, Guangzhou 510535, China
| | - Zhihao Yu
- Guangdong Greater Bay Area Institute of Integrated Circuit and System, Guangzhou 510535, China
- College of Integrated Circuit Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Xiangqian Lu
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Wei Niu
- School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Yao Yu
- College of Integrated Circuit Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Yu Yao
- Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Fuguo Tian
- Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Chee Leong Tan
- College of Integrated Circuit Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Huabin Sun
- Guangdong Greater Bay Area Institute of Integrated Circuit and System, Guangzhou 510535, China
- College of Integrated Circuit Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Li Gao
- School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
- Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Wei Qin
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Yong Xu
- Guangdong Greater Bay Area Institute of Integrated Circuit and System, Guangzhou 510535, China
- College of Integrated Circuit Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Qiang Zhao
- College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), State Key Laboratory of Organic Electronics and Information Displays, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
- Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Xiang-Xiang Song
- CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China Suzhou 215123, China
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2
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Abhervé A, Mercier N, Kumar A, Das TK, Even J, Katan C, Kepenekian M. Chirality Versus Symmetry: Electron's Spin Selectivity in Nonpolar Chiral Lead-Bromide Perovskites. Adv Mater 2023; 35:e2305784. [PMID: 37527791 DOI: 10.1002/adma.202305784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/29/2023] [Indexed: 08/03/2023]
Abstract
In the last decade, chirality-induced spin selectivity (CISS), the spin-selective electron transport through chiral molecules, has been described in a large range of materials, from insulators to superconductors. Because more experimental studies are desired for the theoretical understanding of the CISS effect, chiral metal-halide semiconductors may contribute to the field thanks to their chiroptical and spintronic properties. In this regard, this work uses new chiral organic cations S-HP1A and R-HP1A (HP1A = 2-hydroxy-propyl-1-ammonium) to prepare 2D chiral halide perovskites (HPs) which crystallize in the enantiomorphic space groups P43 21 2 and P41 21 2, respectively. The fourfold symmetry induces antiferroelectricity along the stacking axis which, combined to incomplete Rashba-like splitting in each individual 2D polar layer, results in rare spin textures in the band structure. As revealed by magnetic conductive-probe atomic force microscopy (AFM) measurements, these materials show CISS effect with partial spin polarization (SP; ±40-45%). This incomplete effect is efficient enough to drive a chiro-spintronic device as demonstrated by the fabrication of spin valve devices with magnetoresistance (MR) responses up to 250 K. Therefore, these stable lead-bromide HP materials not only represent interesting candidates for spintronic applications but also reveal the importance of polar symmetry-breaking topology for spin selectivity.
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Affiliation(s)
- Alexandre Abhervé
- MOLTECH-Anjou, UMR 6200, CNRS, UNIV Angers, 2 bd Lavoisier, ANGERS, Cedex, 49045, France
| | - Nicolas Mercier
- MOLTECH-Anjou, UMR 6200, CNRS, UNIV Angers, 2 bd Lavoisier, ANGERS, Cedex, 49045, France
| | - Anil Kumar
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Tapan Kumar Das
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Jacky Even
- Univ Rennes, INSA Rennes, CNRS, Institut FOTON - UMR 6082, Rennes, F-35000, France
| | - Claudine Katan
- Univ Rennes, ENSCR, CNRS, ISCR - UMR 6226, Rennes, F-35000, France
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3
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Hu S, Liu W, Guo L, Zhang R, Gu X, Meng K, Qin Y, Guo A, Yang T, Zhang C, Yang X, Lu S, Wu M, Lu K, Tan T, Zhou E, Wei Z, Sun X. Continuous room-temperature spin-injection modulation achieved by spin-filtering competition in molecular spin valves. Adv Mater 2023:e2300055. [PMID: 37021326 DOI: 10.1002/adma.202300055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/10/2023] [Indexed: 06/19/2023]
Abstract
Abundant spin-related phenomena that originate from interfaces between ferromagnetic electrodes and molecular semiconductors have greatly enriched research in spintronics, and they are considered promising for realizing novel spintronic functionalities in the future. However, despite great efforts, the interfacial effect cannot be precisely controlled to achieve steady and predictable functions, especially at room temperature, and this has gradually become a significant bottleneck in the development of molecular spintronics. In this study, an innovative spin-filtering-competition mechanism was first proposed to continuously modulate the interfacial effect in molecular spin valves at room temperature. To form this novel mechanism, the original spin-filtering effect from pure Co competed with the newly generated one, which was induced by the bonding effect between Co and LiF. Subsequently, by precisely controlling competition through LiF coverage on the Co surface, continuous modulation of the spin-injection process could be successfully achieved at room temperature. Spin polarization of the injected current and magnetoresistance effect could be actively controlled or their sign could be completely reversed through this novel mechanism. This study provided an innovative approach and theory for precisely controlling the spin-related interfacial effects, which may further promote the scientific and technological development of spintronics. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Shunhua Hu
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Wei Liu
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Lidan Guo
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Rui Zhang
- Beijing Key Laboratory of Microstructure and Property of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Xianrong Gu
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Ke Meng
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yang Qin
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ankang Guo
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Tingting Yang
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Cheng Zhang
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Xueli Yang
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Shuhang Lu
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- School of Material Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Meng Wu
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Kun Lu
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Ting Tan
- Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Erjun Zhou
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Zhixiang Wei
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Xiangnan Sun
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- School of Material Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
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Bisswanger T, Winter Z, Schmidt A, Volmer F, Watanabe K, Taniguchi T, Stampfer C, Beschoten B. CVD Bilayer Graphene Spin Valves with 26 μm Spin Diffusion Length at Room Temperature. Nano Lett 2022; 22:4949-4955. [PMID: 35649273 DOI: 10.1021/acs.nanolett.2c01119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We present inverted spin-valve devices fabricated from chemical vapor deposition (CVD)-grown bilayer graphene (BLG) that show more than a doubling in device performance at room temperature compared to state-of-the-art bilayer graphene spin valves. This is made possible by a polydimethylsiloxane droplet-assisted full-dry transfer technique that compensates for previous process drawbacks in device fabrication. Gate dependent Hanle measurements reveal spin lifetimes of up to 5.8 ns and a spin diffusion length of up to 26 μm at room temperature combined with a charge carrier mobility of about 24 000 cm2(V s)-1 for the best device. Our results demonstrate that CVD-grown BLG shows equally good room temperature spin transport properties as both CVD-grown single-layer graphene and even exfoliated single-layer graphene.
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Affiliation(s)
- Timo Bisswanger
- 2nd Institute of Physics and JARA-FIT, RWTH Aachen University, 52074 Aachen, Germany
| | - Zachary Winter
- 2nd Institute of Physics and JARA-FIT, RWTH Aachen University, 52074 Aachen, Germany
| | - Anne Schmidt
- 2nd Institute of Physics and JARA-FIT, RWTH Aachen University, 52074 Aachen, Germany
| | - Frank Volmer
- 2nd Institute of Physics and JARA-FIT, RWTH Aachen University, 52074 Aachen, Germany
| | - Kenji Watanabe
- Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Takashi Taniguchi
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Christoph Stampfer
- 2nd Institute of Physics and JARA-FIT, RWTH Aachen University, 52074 Aachen, Germany
- Peter Grünberg Institute (PGI-9) Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Bernd Beschoten
- 2nd Institute of Physics and JARA-FIT, RWTH Aachen University, 52074 Aachen, Germany
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5
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González JA, Andrés JP, López Antón R. Applied Trends in Magnetic Rare Earth/Transition Metal Alloys and Multilayers. Sensors (Basel) 2021; 21:5615. [PMID: 34451055 PMCID: PMC8402375 DOI: 10.3390/s21165615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/14/2021] [Accepted: 08/17/2021] [Indexed: 11/16/2022]
Abstract
Ferrimagnetic thin films formerly played a very important role in the development of information storage technology. Now they are again at the forefront of the rising field of spintronics. From new, more efficient magnetic recording media and sensors based on spin valves to the promising technologies envisaged by all-optical switching, ferrimagnets offer singular properties that deserve to be studies both from the point of view of fundamental physics and for applications. In this review, we will focus on ferrimagnetic thin films based on the combination of rare earths (RE) and transition metals (TM).
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Affiliation(s)
- Juan Antonio González
- Instituto Regional de Investigación Científica Aplicada (IRICA), Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain; (J.A.G.); (J.P.A.)
- Departamento de Física Aplicada, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - Juan Pedro Andrés
- Instituto Regional de Investigación Científica Aplicada (IRICA), Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain; (J.A.G.); (J.P.A.)
- Departamento de Física Aplicada, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - Ricardo López Antón
- Instituto Regional de Investigación Científica Aplicada (IRICA), Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain; (J.A.G.); (J.P.A.)
- Departamento de Física Aplicada, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
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6
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Guo L, Gu X, Zhu X, Sun X. Recent Advances in Molecular Spintronics: Multifunctional Spintronic Devices. Adv Mater 2019; 31:e1805355. [PMID: 30680807 DOI: 10.1002/adma.201805355] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 10/23/2018] [Indexed: 06/09/2023]
Abstract
The field of spintronics has triggered an enormous revolution in information storage since the first observation of giant magnetoresistance (GMR). Molecular semiconductors are characterized by having very long spin relaxation times up to milliseconds, and are thus widely considered to hold immense potential for spintronic applications. Along with the development of molecular spintronics, it is clear that the study of multipurpose spintronic devices has gradually grown into a new research and development direction. The abundant photoelectric properties of molecular semiconductors and the intriguing functionality of the spinterface, together with novel designs of device structures, have promoted the integration of multiple functions and different mechanisms into discrete spintronic devices. Here, according to the different relationships between the integrated mechanisms, multifunctional molecular spintronic devices containing parallel and interactive types are highlighted. This is followed by the introduction of pure-spin-current-type molecular spintronic devices that have already demonstrated great potential for multifunction exploration. Finally, the challenges and outlook that make this field young and energetic are outlined.
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Affiliation(s)
- Lidan Guo
- Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum Beijing, Beijing, 102249, P. R. China
| | - Xianrong Gu
- Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiangwei Zhu
- Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiangnan Sun
- Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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7
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Galbiati M, Vecchiola A, Mañas-Valero S, Canet-Ferrer J, Galceran R, Piquemal-Banci M, Godel F, Forment-Aliaga A, Dlubak B, Seneor P, Coronado E. A Local Study of the Transport Mechanisms in MoS 2 Layers for Magnetic Tunnel Junctions. ACS Appl Mater Interfaces 2018; 10:30017-30021. [PMID: 30079721 DOI: 10.1021/acsami.8b08853] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
MoS2-based vertical spintronic devices have attracted an increasing interest thanks to theoretical predictions of large magnetoresistance signals. However, experimental performances are still far from expectations. Here, we carry out the local electrical characterization of thin MoS2 flakes in a Co/Al2O3/MoS2 structure through conductive tip AFM measurements. We show that thin MoS2 presents a metallic behavior with a strong lateral transport contribution that hinders the direct tunnelling through thin layers. Indeed, no resistance dependence is observed with the flake thickness. These findings reveal a spin depolarization source in the MoS2-based spin valves, thus pointing to possible solutions to improve their spintronic properties.
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Affiliation(s)
- Marta Galbiati
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán Martínez n° 2 , Paterna 46980 , Spain
| | - Aymeric Vecchiola
- Unité Mixte de Physique, CNRS, Thales , Univ Paris-Sud, Université Paris-Saclay , 91767 Palaiseau , France
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán Martínez n° 2 , Paterna 46980 , Spain
| | - Josep Canet-Ferrer
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán Martínez n° 2 , Paterna 46980 , Spain
- ICFO-Institut de Ciències Fotòniques , The Barcelona Institute of Science and Technology , Barcelona 08860 , Spain
| | - Regina Galceran
- Unité Mixte de Physique, CNRS, Thales , Univ Paris-Sud, Université Paris-Saclay , 91767 Palaiseau , France
| | - Maëlis Piquemal-Banci
- Unité Mixte de Physique, CNRS, Thales , Univ Paris-Sud, Université Paris-Saclay , 91767 Palaiseau , France
| | - Florian Godel
- Unité Mixte de Physique, CNRS, Thales , Univ Paris-Sud, Université Paris-Saclay , 91767 Palaiseau , France
| | - Alicia Forment-Aliaga
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán Martínez n° 2 , Paterna 46980 , Spain
| | - Bruno Dlubak
- Unité Mixte de Physique, CNRS, Thales , Univ Paris-Sud, Université Paris-Saclay , 91767 Palaiseau , France
| | - Pierre Seneor
- Unité Mixte de Physique, CNRS, Thales , Univ Paris-Sud, Université Paris-Saclay , 91767 Palaiseau , France
| | - Eugenio Coronado
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán Martínez n° 2 , Paterna 46980 , Spain
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8
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Sun X, Bedoya-Pinto A, Mao Z, Gobbi M, Yan W, Guo Y, Atxabal A, Llopis R, Yu G, Liu Y, Chuvilin A, Casanova F, Hueso LE. Active Morphology Control for Concomitant Long Distance Spin Transport and Photoresponse in a Single Organic Device. Adv Mater 2016; 28:2609-2615. [PMID: 26823157 DOI: 10.1002/adma.201503831] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 10/09/2015] [Indexed: 06/05/2023]
Abstract
Long distance spin transport and photoresponse are demonstrated in a single F16 CuPc spin valve. By introducing a low-temperature strategy for controlling the morphology of the organic layer during the fabrication of a molecular spin valve, a large spin-diffusion length up to 180 nm is achieved at room temperature. Magnetoresistive and photoresponsive signals are simultaneously observed even in an air atmosphere.
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Affiliation(s)
- Xiangnan Sun
- National Center for Nanoscience and Technology, 100190, Beijing, P. R. China
| | | | - Zupan Mao
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, P. R. China
| | - Marco Gobbi
- I.S.I.S, University de Strasbourg, Allée Gaspard Monge 8, F-67083, Strasbourg, France
| | - Wenjing Yan
- CIC nanoGUNE, 20018 Donostia-San Sebastian, Basque Country, Spain
| | - Yunlong Guo
- Department of Chemistry, The University of Tokyo, 113-0033, Tokyo, Japan
| | - Ainhoa Atxabal
- CIC nanoGUNE, 20018 Donostia-San Sebastian, Basque Country, Spain
| | - Roger Llopis
- CIC nanoGUNE, 20018 Donostia-San Sebastian, Basque Country, Spain
| | - Gui Yu
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, P. R. China
| | - Yunqi Liu
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, P. R. China
| | - Andrey Chuvilin
- CIC nanoGUNE, 20018 Donostia-San Sebastian, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Basque Country, Spain
| | - Felix Casanova
- CIC nanoGUNE, 20018 Donostia-San Sebastian, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Basque Country, Spain
| | - Luis E Hueso
- CIC nanoGUNE, 20018 Donostia-San Sebastian, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Basque Country, Spain
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9
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Leitao DC, Coelho P, Borme J, Knudde S, Cardoso S, Freitas PP. Ultra-Compact 100 × 100 μm² Footprint Hybrid Device with Spin-Valve Nanosensors. Sensors (Basel) 2015; 15:30311-8. [PMID: 26690144 PMCID: PMC4721729 DOI: 10.3390/s151229809] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 11/26/2015] [Accepted: 11/27/2015] [Indexed: 11/16/2022]
Abstract
Magnetic field mapping with micrometric spatial resolution and high sensitivity is a challenging application, and the technological solutions are usually based on large area devices integrating discrete magnetic flux guide elements. In this work we demonstrate a high performance hybrid device with improved field sensitivity levels and small footprint, consisting of a ultra-compact 2D design where nanometric spin valve sensors are inserted within the gap of thin-film magnetic flux concentrators. Pole-sensor distances down to 400 nm are demonstrated using nanofabrication techniques combined with an optimized liftoff process. These 100 × 100 μm2 pixel sensors can be integrated in modular devices for surface mapping without moving parts.
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Affiliation(s)
- Diana C Leitao
- INESC-MN - Instituto de Engenharia de Sistemas e Computadores - Microsistemas e Nanotecnologias and IN - Institute of Nanoscience and Nanotechnology, Rua Alves Redol 9, Lisboa 1000-029, Portugal.
- Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1000, Portugal.
| | - Paulo Coelho
- INESC-MN - Instituto de Engenharia de Sistemas e Computadores - Microsistemas e Nanotecnologias and IN - Institute of Nanoscience and Nanotechnology, Rua Alves Redol 9, Lisboa 1000-029, Portugal.
| | - Jerome Borme
- INL - International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, 4715 Braga, Portugal.
| | - Simon Knudde
- INESC-MN - Instituto de Engenharia de Sistemas e Computadores - Microsistemas e Nanotecnologias and IN - Institute of Nanoscience and Nanotechnology, Rua Alves Redol 9, Lisboa 1000-029, Portugal.
- Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1000, Portugal.
| | - Susana Cardoso
- INESC-MN - Instituto de Engenharia de Sistemas e Computadores - Microsistemas e Nanotecnologias and IN - Institute of Nanoscience and Nanotechnology, Rua Alves Redol 9, Lisboa 1000-029, Portugal.
- Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1000, Portugal.
| | - Paulo P Freitas
- INESC-MN - Instituto de Engenharia de Sistemas e Computadores - Microsistemas e Nanotecnologias and IN - Institute of Nanoscience and Nanotechnology, Rua Alves Redol 9, Lisboa 1000-029, Portugal.
- INL - International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, 4715 Braga, Portugal.
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Zhang X, Ma Q, Suzuki K, Sugihara A, Qin G, Miyazaki T, Mizukami S. Magnetoresistance effect in rubrene-based spin valves at room temperature. ACS Appl Mater Interfaces 2015; 7:4685-4692. [PMID: 25668508 DOI: 10.1021/am508173j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We fabricate spin-valve devices with an Fe3O4/AlO/rubrene/Co stacking structure. Their magnetoresistance (MR) effects at room temperature and low temperatures are systemically investigated based on the measurement of MR curves, current-voltage response, etc. A large MR ratio of approximately 6% is achieved at room temperature, which is one of the highest MR ratios reported to date in organic spin valves. With decreasing measurement temperatures, we observe that the MR ratios increase because of decrease in spin scattering, and the width of the MR curves becomes larger owing to increase in the coercivity of the electrodes at low temperature. A nonlinear current-voltage dependence is clearly observed in these organic spin valves. From the measurement of MR curve for the spin valves with different rubrene layer thickness, we observe that the MR ratios monotonously decrease with increasing rubrene-layer thickness. We discuss the spin-dependent transport mechanisms in these devices based on our experimental results and the present theoretical analysis. Moreover, we note that the devices exhibit smaller MR ratios after annealing compared to their counterparts without annealing. On the basis of atomic force microscopy analysis of the organic films and device resistances, we deduce that the increase of interface spin scattering induced by large surface roughness after annealing most probably leads to reduction in the MR ratios.
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Affiliation(s)
- Xianmin Zhang
- Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University , Shenyang 110819, China
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