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Tan C, Deng M, Yang Y, An L, Ge W, Albarakati S, Panahandeh-Fard M, Partridge J, Culcer D, Lei B, Wu T, Zhu X, Tian M, Chen X, Wang RQ, Wang L. Electrically Tunable, Rapid Spin-Orbit Torque Induced Modulation of Colossal Magnetoresistance in Mn 3Si 2Te 6 Nanoflakes. Nano Lett 2024; 24:4158-4164. [PMID: 38557108 DOI: 10.1021/acs.nanolett.4c00054] [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: 04/04/2024]
Abstract
As a quasi-layered ferrimagnetic material, Mn3Si2Te6 nanoflakes exhibit magnetoresistance behavior that is fundamentally different from their bulk crystal counterparts. They offer three key properties crucial for spintronics. First, at least 106 times faster response compared to that exhibited by bulk crystals has been observed in current-controlled resistance and magnetoresistance. Second, ultralow current density is required for resistance modulation (∼5 A/cm2). Third, electrically gate-tunable magnetoresistance has been realized. Theoretical calculations reveal that the unique magnetoresistance behavior in the Mn3Si2Te6 nanoflakes arises from a magnetic field induced band gap shift across the Fermi level. The rapid current induced resistance variation is attributed to spin-orbit torque, an intrinsically ultrafast process (∼nanoseconds). This study suggests promising avenues for spintronic applications. In addition, it highlights Mn3Si2Te6 nanoflakes as a suitable platform for investigating the intriguing physics underlying chiral orbital moments, magnetic field induced band variation, and spin torque.
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Affiliation(s)
- Cheng Tan
- Lab of Low Dimensional Magnetism and Spintronic Devices, School of Physics, Hefei University of Technology, Hefei, Anhui 230009, China
- ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), School of Science, RMIT University, Melbourne, Victoria 3001, Australia
| | - Mingxun Deng
- Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, SPTE, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Yuanjun Yang
- Lab of Low Dimensional Magnetism and Spintronic Devices, School of Physics, Hefei University of Technology, Hefei, Anhui 230009, China
| | - Linlin An
- Lab of Low Dimensional Magnetism and Spintronic Devices, School of Physics, Hefei University of Technology, Hefei, Anhui 230009, China
| | - Weifeng Ge
- Lab of Low Dimensional Magnetism and Spintronic Devices, School of Physics, Hefei University of Technology, Hefei, Anhui 230009, China
| | - Sultan Albarakati
- ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), School of Science, RMIT University, Melbourne, Victoria 3001, Australia
- Physics Department, Faculty of Science and Arts, University of Jeddah, P.O. Box 80200, Khulais 21589, Saudi Arabia
| | - Majid Panahandeh-Fard
- ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), School of Science, RMIT University, Melbourne, Victoria 3001, Australia
| | - James Partridge
- Physics, School of Science, RMIT University, Melbourne, Victoria 3001, Australia
| | - Dimitrie Culcer
- School of Physics and ARC Centre of Excellence in Future Low-Energy Electronics Technologies, UNSW Node, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Bin Lei
- School of Physics and Optoelectronic Engineering, Anhui University, Hefei, Anhui 230601, China
| | - Tao Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- CAS Key Laboratory of Strongly coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiangde Zhu
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences (CAS), Hefei, Anhui 230031, China
| | - Mingliang Tian
- School of Physics and Optoelectronic Engineering, Anhui University, Hefei, Anhui 230601, China
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences (CAS), Hefei, Anhui 230031, China
| | - Xianhui Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- CAS Key Laboratory of Strongly coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Rui-Qiang Wang
- Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, SPTE, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Lan Wang
- Lab of Low Dimensional Magnetism and Spintronic Devices, School of Physics, Hefei University of Technology, Hefei, Anhui 230009, China
- Physics, School of Science, RMIT University, Melbourne, Victoria 3001, Australia
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Peng Y, Shi L, Zhao G, Zhang J, Zhao J, Wang X, Deng Z, Jin C. Colossal Magnetoresistance in Layered Diluted Magnetic Semiconductor Rb(Zn,Li,Mn) 4As 3 Single Crystals. Nanomaterials (Basel) 2024; 14:263. [PMID: 38334534 PMCID: PMC10856780 DOI: 10.3390/nano14030263] [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: 12/12/2023] [Revised: 01/10/2024] [Accepted: 01/15/2024] [Indexed: 02/10/2024]
Abstract
Diluted magnetic semiconductors (DMSs) with tunable ferromagnetism are among the most promising materials for fabricating spintronic devices. Some DMS systems have sizeable magnetoresistances that can further extend their applications. Here, we report a new DMS Rb(Zn1-x-yLiyMnx)4As3 with a quasi-two-dimensional structure showing sizeable anisotropies in its ferromagnetism and transverse magnetoresistance (MR). With proper charge and spin doping, single crystals of the DMS display Curie temperatures up to 24 K. Analysis of the critical behavior via Arrott plots confirms the long-range ferromagnetic ordering in the Rb(Zn1-x-yLiyMnx)4As3 single crystals. We observed remarkable intrinsic MR effects in the single crystals (i.e., a positive MR of 85% at 0.4 T and a colossal negative MR of -93% at 7 T).
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Affiliation(s)
- Yi Peng
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (Y.P.); (G.Z.); (J.Z.)
- School of Physics, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Luchuan Shi
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (Y.P.); (G.Z.); (J.Z.)
- School of Physics, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Guoqiang Zhao
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (Y.P.); (G.Z.); (J.Z.)
| | - Jun Zhang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (Y.P.); (G.Z.); (J.Z.)
| | - Jianfa Zhao
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (Y.P.); (G.Z.); (J.Z.)
| | - Xiancheng Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (Y.P.); (G.Z.); (J.Z.)
| | - Zheng Deng
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (Y.P.); (G.Z.); (J.Z.)
- School of Physics, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Changqing Jin
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (Y.P.); (G.Z.); (J.Z.)
- School of Physics, University of Chinese Academy of Sciences, Beijing 101408, China
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3
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Bisht P, Mahato RN. Investigation of magnetic properties and colossal magnetoresistance in nanocrystalline doped manganite. J Phys Condens Matter 2023; 35:475802. [PMID: 37579760 DOI: 10.1088/1361-648x/acf01a] [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: 06/12/2023] [Accepted: 08/14/2023] [Indexed: 08/16/2023]
Abstract
Here in, we report structural, magnetic, and magneto-transport properties of nanocrystalline La0.6Ag0.2Bi0.2MnO3prepared using citrate sol-gel method. By using scanning and transmission electron microscopy measurements, the morphology and particle size of the sample have been confirmed. The Mn2p x-ray photoelectron spectroscopy spectra revealed the nanoparticles contained the coexistence of Mn3+and Mn4+ions with Mn3+/Mn4+ratio of 2:1. Field-cooled and zero field-cooled magnetization protocols with temperature span of 5 K-300 K, confirm the paramagnetic (PM) to ferromagnetic (FM) phase transition at critical temperature,TC∼ 146 K. The complete investigation of isothermal magnetization (130⩽T (K)⩽160,ΔT=2 K), Arrott plots, and magnetocaloric effect as well as quantitative analysis of second-order phase transition has been studied. The criticality at the PM-FM transition was examined for the sample, and the obtained critical exponents were verified for their reliability through the utilization of the scaling hypothesis and Kouvel-Fisher plot. We observed a large magnetic entropy change (∼7 J-Kg-1K-1) atTCupon 5 T magnetic field strength. The renormalized magnetic entropy change plots are found to collapse onto a single curve, thus verifying the universality of the sample. Above the metal-insulator transitions the electrical resistivity shows a small polaron hopping conduction mechanism, however, at low temperatures scattering mechanism dominates and the whole range was explained by the universal percolation model. The colossal value of negative MR is found to be 88% at 168 K under an applied field strength of 2 T. As a result of our experimental data, we can grasp the intuitive understanding of magnetic as well as transport properties in Bi-doped manganite systems potential for magnetic sensors and spintronics applications.
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Affiliation(s)
- Priyanka Bisht
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Rabindra Nath Mahato
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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Žurauskienė N, Rudokas V, Tolvaišienė S. Magnetoresistance and Magnetic Relaxation of La-Sr-Mn-O Films Grown on Si/SiO 2 Substrate by Pulsed Injection MOCVD. Sensors (Basel) 2023; 23:5365. [PMID: 37420532 DOI: 10.3390/s23125365] [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: 05/04/2023] [Revised: 05/24/2023] [Accepted: 06/04/2023] [Indexed: 07/09/2023]
Abstract
The results of magnetoresistance (MR) and resistance relaxation of nanostructured La1-xSrxMnyO3 (LSMO) films with different film thicknesses (60-480 nm) grown on Si/SiO2 substrate by the pulsed-injection MOCVD technique are presented and compared with the reference manganite LSMO/Al2O3 films of the same thickness. The MR was investigated in permanent (up to 0.7 T) and pulsed (up to 10 T) magnetic fields in the temperature range of 80-300 K, and the resistance-relaxation processes were studied after the switch-off of the magnetic pulse with an amplitude of 10 T and a duration of 200 μs. It was found that the high-field MR values were comparable for all investigated films (~-40% at 10 T), whereas the memory effects differed depending on the film thickness and substrate used for the deposition. It was demonstrated that resistance relaxation to the initial state after removal of the magnetic field occurred in two time scales: fast' (~300 μs) and slow (longer than 10 ms). The observed fast relaxation process was analyzed using the Kolmogorov-Avrami-Fatuzzo model, taking into account the reorientation of magnetic domains into their equilibrium state. The smallest remnant resistivity values were found for the LSMO films grown on SiO2/Si substrate in comparison to the LSMO/Al2O3 films. The testing of the LSMO/SiO2/Si-based magnetic sensors in an alternating magnetic field with a half-period of 22 μs demonstrated that these films could be used for the development of fast magnetic sensors operating at room temperature. For operation at cryogenic temperature, the LSMO/SiO2/Si films could be employed only for single-pulse measurements due to magnetic-memory effects.
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Affiliation(s)
- Nerija Žurauskienė
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, LT-10257 Vilnius, Lithuania
- Faculty of Electronics, Vilnius Gediminas Technical University, LT-10223 Vilnius, Lithuania
| | - Vakaris Rudokas
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, LT-10257 Vilnius, Lithuania
| | - Sonata Tolvaišienė
- Faculty of Electronics, Vilnius Gediminas Technical University, LT-10223 Vilnius, Lithuania
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Žurauskienė N. Engineering of Advanced Materials for High Magnetic Field Sensing: A Review. Sensors (Basel) 2023; 23:2939. [PMID: 36991646 PMCID: PMC10059877 DOI: 10.3390/s23062939] [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] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/04/2023] [Accepted: 03/05/2023] [Indexed: 06/19/2023]
Abstract
Advanced scientific and industrial equipment requires magnetic field sensors with decreased dimensions while keeping high sensitivity in a wide range of magnetic fields and temperatures. However, there is a lack of commercial sensors for measurements of high magnetic fields, from ∼1 T up to megagauss. Therefore, the search for advanced materials and the engineering of nanostructures exhibiting extraordinary properties or new phenomena for high magnetic field sensing applications is of great importance. The main focus of this review is the investigation of thin films, nanostructures and two-dimensional (2D) materials exhibiting non-saturating magnetoresistance up to high magnetic fields. Results of the review showed how tuning of the nanostructure and chemical composition of thin polycrystalline ferromagnetic oxide films (manganites) can result in a remarkable colossal magnetoresistance up to megagauss. Moreover, by introducing some structural disorder in different classes of materials, such as non-stoichiometric silver chalcogenides, narrow band gap semiconductors, and 2D materials such as graphene and transition metal dichalcogenides, the possibility to increase the linear magnetoresistive response range up to very strong magnetic fields (50 T and more) and over a large range of temperatures was demonstrated. Approaches for the tailoring of the magnetoresistive properties of these materials and nanostructures for high magnetic field sensor applications were discussed and future perspectives were outlined.
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Affiliation(s)
- Nerija Žurauskienė
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, 10257 Vilnius, Lithuania;
- Faculty of Electronics, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania
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Guo S, Wang B, Wolf D, Lubk A, Xia W, Wang M, Xiao Y, Cui J, Pravarthana D, Dou Z, Leistner K, Li RW, Hühne R, Nielsch K. Hierarchically Engineered Manganite Thin Films with a Wide-Temperature-Range Colossal Magnetoresistance Response. ACS Nano 2023; 17:2517-2528. [PMID: 36651833 DOI: 10.1021/acsnano.2c10200] [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: 06/17/2023]
Abstract
Colossal magnetoresistance is of great fundamental and technological significance in condensed-matter physics, magnetic memory, and sensing technologies. However, its relatively narrow working temperature window is still a severe obstacle for potential applications due to the nature of the material-inherent phase transition. Here, we realized hierarchical La0.7Sr0.3MnO3 thin films with well-defined (001) and (221) crystallographic orientations by combining substrate modification with conventional thin-film deposition. Microscopic investigations into its magnetic transition through electron holography reveal that the hierarchical microstructure significantly broadens the temperature range of the ferromagnetic-paramagnetic transition, which further widens the response temperature range of the macroscopic colossal magnetoresistance under the scheme of the double-exchange mechanism. Therefore, this work puts forward a method to alter the magnetic transition and thus to extend the magnetoresistance working window by nanoengineering, which might be a promising approach also for other phase-transition-related effects in functional oxides.
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Affiliation(s)
- Shanshan Guo
- CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China
- Leibniz IFW Dresden, Dresden 01069, Germany
| | - Baomin Wang
- CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China
- School of Physical Science and Technology, Ningbo University, Ningbo 315201, People's Republic of China
| | | | - Axel Lubk
- Leibniz IFW Dresden, Dresden 01069, Germany
- Institute of Solid State and Materials Physics, TU Dresden, Dresden 01069, Germany
| | - Weixing Xia
- CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China
| | - Mingkun Wang
- CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China
| | - Yao Xiao
- CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China
| | - Junfeng Cui
- Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China
| | - Dhanapal Pravarthana
- CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China
| | - Zehua Dou
- Leibniz IFW Dresden, Dresden 01069, Germany
| | - Karin Leistner
- Leibniz IFW Dresden, Dresden 01069, Germany
- Electrochemical Sensors and Energy Storage, Faculty of Natural Sciences, Institute of Chemistry, TU Chemnitz, Chemnitz 09111, Germany
| | - Run-Wei Li
- CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China
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Stankevič V, Keršulis S, Dilys J, Bleizgys V, Viliūnas M, Vertelis V, Maneikis A, Rudokas V, Plaušinaitienė V, Žurauskienė N. Measurement System for Short-Pulsed Magnetic Fields. Sensors (Basel) 2023; 23:1435. [PMID: 36772475 PMCID: PMC9920646 DOI: 10.3390/s23031435] [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] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/20/2023] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
A measurement system based on the colossal magnetoresistance CMR-B-scalar sensor was developed for the measurement of short-duration high-amplitude magnetic fields. The system consists of a magnetic field sensor made from thin nanostructured manganite film with minimized memory effect, and a magnetic field recording module. The memory effect of the La1-xSrx(Mn1-yCoy)zO3 manganite films doped with different amounts of Co and Mn was investigated by measuring the magnetoresistance (MR) and resistance relaxation in pulsed magnetic fields up to 20 T in the temperature range of 80-365 K. It was found that for low-temperature applications, films doped with Co (LSMCO) are preferable due to the minimized magnetic memory effect at these temperatures, compared with LSMO films without Co. For applications at temperatures higher than room temperature, nanostructured manganite LSMO films with increased Mn content above the stoichiometric level have to be used. These films do not exhibit magnetic memory effects and have higher MR values. To avoid parasitic signal due to electromotive forces appearing in the transmission line of the sensor during measurement of short-pulsed magnetic fields, a bipolar-pulsed voltage supply for the sensor was used. For signal recording, a measurement module consisting of a pulsed voltage generator with a frequency up to 12.5 MHz, a 16-bit ADC with a sampling rate of 25 MHz, and a microprocessor was proposed. The circuit of the measurement module was shielded against low- and high-frequency electromagnetic noise, and the recorded signal was transmitted to a personal computer using a fiber optic link. The system was tested using magnetic field generators, generating magnetic fields with pulse durations ranging from 3 to 20 μs. The developed magnetic field measurement system can be used for the measurement of high-pulsed magnetic fields with pulse durations in the order of microseconds in different fields of science and industry.
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Affiliation(s)
- Voitech Stankevič
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, 10257 Vilnius, Lithuania
- Faculty of Electronics, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania
| | - Skirmantas Keršulis
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, 10257 Vilnius, Lithuania
| | - Justas Dilys
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, 10257 Vilnius, Lithuania
| | - Vytautas Bleizgys
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, 10257 Vilnius, Lithuania
| | - Mindaugas Viliūnas
- Institute of Chemical Physics, Faculty of Physics, Vilnius University, 03225 Vilnius, Lithuania
| | - Vilius Vertelis
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, 10257 Vilnius, Lithuania
- Faculty of Electronics, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania
| | - Andrius Maneikis
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, 10257 Vilnius, Lithuania
| | - Vakaris Rudokas
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, 10257 Vilnius, Lithuania
| | - Valentina Plaušinaitienė
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, 10257 Vilnius, Lithuania
- Faculty of Chemistry and Geosciences, Vilnius University, 03225 Vilnius, Lithuania
| | - Nerija Žurauskienė
- Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio Ave. 3, 10257 Vilnius, Lithuania
- Faculty of Electronics, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania
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Sarkar A, Wang D, Kante MV, Eiselt L, Trouillet V, Iankevich G, Zhao Z, Bhattacharya SS, Hahn H, Kruk R. High Entropy Approach to Engineer Strongly Correlated Functionalities in Manganites. Adv Mater 2023; 35:e2207436. [PMID: 36383029 DOI: 10.1002/adma.202207436] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 11/04/2022] [Indexed: 06/16/2023]
Abstract
Technologically relevant strongly correlated phenomena such as colossal magnetoresistance (CMR) and metal-insulator transitions (MIT) exhibited by perovskite manganites are driven and enhanced by the coexistence of multiple competing magneto-electronic phases. Such magneto-electronic inhomogeneity is governed by the intrinsic lattice-charge-spin-orbital correlations, which, in turn, are conventionally tailored in manganites via chemical substitution, charge doping, or strain engineering. Alternately, the recently discovered high entropy oxides (HEOs), owing to the presence of multiple-principal cations on a given sub-lattice, exhibit indications of an inherent magneto-electronic phase separation encapsulated in a single crystallographic phase. Here, the high entropy (HE) concept is combined with standard property control by hole doping in a series of single-phase orthorhombic HE-manganites (HE-Mn), (Gd0.25 La0.25 Nd0.25 Sm0.25 )1- x Srx MnO3 (x = 0-0.5). High-resolution transmission microscopy reveals hitherto-unknown lattice imperfections in HEOs: twins, stacking faults, and missing planes. Magnetometry and electrical measurements infer three distinct ground states-insulating antiferromagnetic, unpercolated metallic ferromagnetic, and long-range metallic ferromagnetic-coexisting or/and competing as a result of hole doping and multi-cation complexity. Consequently, CMR ≈1550% stemming from an MIT is observed in polycrystalline pellets, matching the best-known values for bulk conventional manganites. Hence, this initial case study highlights the potential for a synergetic development of strongly correlated oxides offered by the high entropy design approach.
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Affiliation(s)
- Abhishek Sarkar
- KIT-TUD Joint Research Laboratory Nanomaterials - Technische Universität Darmstadt, Otto-Berndt-Str. 3, 64287, Darmstadt, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Di Wang
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Karlsruhe Nano Micro Facility (KNMFi), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Mohana V Kante
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Luis Eiselt
- KIT-TUD Joint Research Laboratory Nanomaterials - Technische Universität Darmstadt, Otto-Berndt-Str. 3, 64287, Darmstadt, Germany
| | - Vanessa Trouillet
- Karlsruhe Nano Micro Facility (KNMFi), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Institute for Applied Materials (IAM-ESS), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Gleb Iankevich
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Zhibo Zhao
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Subramshu S Bhattacharya
- Nanofunctional Materials Technology Centre (NFMTC), Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Horst Hahn
- KIT-TUD Joint Research Laboratory Nanomaterials - Technische Universität Darmstadt, Otto-Berndt-Str. 3, 64287, Darmstadt, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Robert Kruk
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
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9
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Zurauskiene N, Stankevic V, Kersulis S, Vagner M, Plausinaitiene V, Dobilas J, Vasiliauskas R, Skapas M, Koliada M, Pietosa J, Wisniewski A. Enhancement of Room-Temperature Low-Field Magnetoresistance in Nanostructured Lanthanum Manganite Films for Magnetic Sensor Applications. Sensors (Basel) 2022; 22. [PMID: 35684630 DOI: 10.3390/s22114004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 05/20/2022] [Accepted: 05/23/2022] [Indexed: 01/25/2023]
Abstract
The results of colossal magnetoresistance (CMR) properties of La1-xSrxMnyO3 (LSMO) films grown by the pulsed injection MOCVD technique onto an Al2O3 substrate are presented. The grown films with different Sr (0.05 ≤ x ≤ 0.3) and Mn excess (y > 1) concentrations were nanostructured with vertically aligned column-shaped crystallites spread perpendicular to the film plane. It was found that microstructure, resistivity, and magnetoresistive properties of the films strongly depend on the strontium and manganese concentration. All films (including low Sr content) exhibit a metal−insulator transition typical for manganites at a certain temperature, Tm. The Tm vs. Sr content dependence for films with a constant Mn amount has maxima that shift to lower Sr values with the increase in Mn excess in the films. Moreover, the higher the Mn excess concentration in the films, the higher the Tm value obtained. The highest Tm values (270 K) were observed for nanostructured LSMO films with x = 0.17−0.18 and y = 1.15, while the highest low-field magnetoresistance (0.8% at 50 mT) at room temperature (290 K) was achieved for x = 0.3 and y = 1.15. The obtained low-field MR values were relatively high in comparison to those published in the literature results for lanthanum manganite films prepared without additional insulating oxide phases. It can be caused by high Curie temperature (383 K), high saturation magnetization at room temperature (870 emu/cm3), and relatively thin grain boundaries. The obtained results allow to fabricate CMR sensors for low magnetic field measurement at room temperature.
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Stankevic V, Zurauskiene N, Kersulis S, Plausinaitiene V, Lukose R, Klimantavicius J, Tolvaišienė S, Skapas M, Selskis A, Balevicius S. Nanostructured Manganite Films Grown by Pulsed Injection MOCVD: Tuning Low- and High-Field Magnetoresistive Properties for Sensors Applications. Sensors (Basel) 2022; 22:605. [PMID: 35062569 DOI: 10.3390/s22020605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/08/2022] [Accepted: 01/10/2022] [Indexed: 12/04/2022]
Abstract
The results of colossal magnetoresistance (CMR) properties of La0.83Sr0.17Mn1.21O3 (LSMO) films grown by pulsed injection MOCVD technique onto various substrates are presented. The films with thicknesses of 360 nm and 60 nm grown on AT-cut single crystal quartz, polycrystalline Al2O3, and amorphous Si/SiO2 substrates were nanostructured with column-shaped crystallites spread perpendicular to the film plane. It was found that morphology, microstructure, and magnetoresistive properties of the films strongly depend on the substrate used. The low-field MR at low temperatures (25 K) showed twice higher values (−31% at 0.7 T) for LSMO/quartz in comparison to films grown on the other substrates (−15%). This value is high in comparison to results published in literature for manganite films prepared without additional insulating oxides. The high-field MR measured up to 20 T at 80 K was also the highest for LSMO/quartz films (−56%) and demonstrated the highest sensitivity S = 0.28 V/T at B = 0.25 T (voltage supply 2.5 V), which is promising for magnetic sensor applications. It was demonstrated that Mn excess Mn/(La + Sr) = 1.21 increases the metal-insulator transition temperature of the films up to 285 K, allowing the increase in the operation temperature of magnetic sensors up to 363 K. These results allow us to fabricate CMR sensors with predetermined parameters in a wide range of magnetic fields and temperatures.
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11
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Zhang SJ, Yan JM, Tang F, Wu J, Dong WQ, Zhang DW, Luo FS, Chen L, Fang Y, Zhang T, Chai Y, Zhao W, Wang X, Zheng RK. Colossal Magnetoresistance in Ti Lightly Doped Cr 2Se 3 Single Crystals with a Layered Structure. ACS Appl Mater Interfaces 2021; 13:58949-58955. [PMID: 34854300 DOI: 10.1021/acsami.1c18848] [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: 06/13/2023]
Abstract
Stoichiometric Cr2Se3 single crystals are particular layer-structured antiferromagnets, which possess a noncollinear spin configuration, weak ferromagnetic moments, moderate magnetoresistance (MR ∼14.3%), and poor metallic conductivity below the antiferromagnetic phase transition. Here, we report an interesting >16 000% colossal magnetoresistance (CMR) effect in Ti (1.5 atomic percent) lightly doped Cr2Se3 single crystals. Such a CMR is approximately 1143 times larger than that of the stoichiometric Cr2Se3 crystals and is rarely observed in layered antiferromagnets and is attributed to the frustrated spin configuration. Moreover, the Ti doping not only dramatically changes the electronic conductivity of the Cr2Se3 crystal from a bad metal to a semiconductor with a gap of ∼15 meV but also induces a change in the magnetic anisotropy of the Cr2Se3 crystal from strong out-of-plane to weak in-plane. Further, magnetotransport measurements reveal that the low-field MR scales with the square of the reduced magnetization, which is a signature of CMR materials. The layered Ti:Cr2Se3 with the CMR effect could be used as two-dimensional (2D) heterostructure building blocks to provide colossal negative MR in spintronic devices.
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Affiliation(s)
- Shu-Juan Zhang
- School of Materials Science and Engineering and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
- School of Materials and Mechanic & Electrical Engineering, Jiangxi Science and Technology Normal University, Nanchang 330038, China
| | - Jian-Min Yan
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - F Tang
- Jiangsu Laboratory of Advanced Functional Materials and Department of Physics, Changshu Institute of Technology, Changshu 215500, China
| | - Jin Wu
- School of Materials Science and Engineering and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
| | - Wei-Qi Dong
- School of Materials Science and Engineering and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
| | - Dan-Wen Zhang
- School of Materials Science and Engineering and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
| | - Fu-Sheng Luo
- School of Materials Science and Engineering and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
| | - Lei Chen
- School of Materials Science and Engineering and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
| | - Y Fang
- Jiangsu Laboratory of Advanced Functional Materials and Department of Physics, Changshu Institute of Technology, Changshu 215500, China
| | - Tao Zhang
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, China
| | - Yang Chai
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Weiyao Zhao
- Institute for Superconducting and Electronic Materials & ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Innovation Campus, University of Wollongong, North Wollongong, NSW 2500, Australia
| | - Xiaolin Wang
- Institute for Superconducting and Electronic Materials & ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Innovation Campus, University of Wollongong, North Wollongong, NSW 2500, Australia
| | - Ren-Kui Zheng
- School of Materials Science and Engineering and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
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Greculeasa SG, Stanciu AE, Leca A, Kuncser A, Hrib L, Chirila C, Pasuk I, Kuncser V. Influence of Thickness on the Magnetic and Magnetotransport Properties of Epitaxial La 0.7Sr 0.3MnO 3 Films Deposited on STO (0 0 1). Nanomaterials (Basel) 2021; 11:3389. [PMID: 34947736 PMCID: PMC8706966 DOI: 10.3390/nano11123389] [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: 11/02/2021] [Revised: 11/29/2021] [Accepted: 12/11/2021] [Indexed: 11/30/2022]
Abstract
Epitaxial La0.7Sr0.3MnO3 films with different thicknesses (9-90 nm) were deposited on SrTiO3 (0 0 1) substrates by pulsed laser deposition. The films have been investigated with respect to morpho-structural, magnetic, and magneto-transport properties, which have been proven to be thickness dependent. Magnetic contributions with different switching mechanisms were evidenced, depending on the perovskite film thickness. The Curie temperature increases with the film thickness. In addition, colossal magnetoresistance effects of up to 29% above room temperature were evidenced and discussed in respect to the magnetic behavior and film thickness.
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Affiliation(s)
| | | | | | | | | | | | | | - Victor Kuncser
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (S.G.G.); (A.-E.S.); (A.L.); (A.K.); (L.H.); (C.C.); (I.P.)
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13
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Gainza J, Serrano-Sánchez F, Rodrigues JEFS, Nemes NM, Martínez JL, Alonso JA. Metastable Materials Accessed under Moderate Pressure Conditions (P ≤ 3.5 GPa) in a Piston-Cylinder Press. Materials (Basel) 2021; 14:1946. [PMID: 33924529 DOI: 10.3390/ma14081946] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/08/2021] [Accepted: 04/09/2021] [Indexed: 11/23/2022]
Abstract
In this review, we describe different families of metastable materials, some of them with relevant technological applications, which can be stabilized at moderate pressures 2–3.5 GPa in a piston-cylinder press. The synthesis of some of these systems had been previously reported under higher hydrostatic pressures (6–10 GPa), but can be accessed under milder conditions in combination with reactive precursors prepared by soft-chemistry techniques. These systems include perovskites with transition metals in unusual oxidation states (e.g., RNiO3 with Ni3+, R = rare earths); double perovskites such as RCu3Mn4O12 with Jahn–Teller Cu2+ ions at A sites, pyrochlores derived from Tl2Mn2O7 with colossal magnetoresistance, pnictide skutterudites MxCo4Sb12 (M = La, Yb, Ce, Sr, K) with thermoelectric properties, or metal hydrides Mg2MHx (M = Fe, Co, Ni) and AMgH3 (A: alkali metals) with applications in hydrogen storage. The availability of substantial amounts of sample (0.5–1.5 g) allows a complete characterization of the properties of interest, including magnetic, transport, thermoelectric properties and so on, and the structural characterization by neutron or synchrotron X-ray diffraction techniques.
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14
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Wang ZC, Rogers JD, Yao X, Nichols R, Atay K, Xu B, Franklin J, Sochnikov I, Ryan PJ, Haskel D, Tafti F. Colossal Magnetoresistance without Mixed Valence in a Layered Phosphide Crystal. Adv Mater 2021; 33:e2005755. [PMID: 33511677 DOI: 10.1002/adma.202005755] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 01/07/2021] [Indexed: 06/12/2023]
Abstract
Materials with strong magnetoresistive responses are the backbone of spintronic technology, magnetic sensors, and hard drives. Among them, manganese oxides with a mixed valence and a cubic perovskite structure stand out due to their colossal magnetoresistance (CMR). A double exchange interaction underlies the CMR in manganates, whereby charge transport is enhanced when the spins on neighboring Mn3+ and Mn4+ ions are parallel. Prior efforts to find different materials or mechanisms for CMR resulted in a much smaller effect. Here an enormous CMR at low temperatures in EuCd2 P2 without manganese, oxygen, mixed valence, or cubic perovskite structure is shown. EuCd2 P2 has a layered trigonal lattice and exhibits antiferromagnetic ordering at 11 K. The magnitude of CMR (104 %) in as-grown crystals of EuCd2 P2 rivals the magnitude in optimized thin films of manganates. The magnetization, transport, and synchrotron X-ray data suggest that strong magnetic fluctuations are responsible for this phenomenon. The realization of CMR at low temperatures without heterovalency leads to a new regime for materials and technologies related to antiferromagnetic spintronics.
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Affiliation(s)
- Zhi-Cheng Wang
- Departments of Physics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA, 02467, USA
| | - Jared D Rogers
- Departments of Physics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA, 02467, USA
| | - Xiaohan Yao
- Departments of Physics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA, 02467, USA
| | - Renee Nichols
- Departments of Physics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA, 02467, USA
| | - Kemal Atay
- Departments of Physics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA, 02467, USA
| | - Bochao Xu
- Physics Department, University of Connecticut, Storrs, CT, 06269, USA
| | - Jacob Franklin
- Physics Department, University of Connecticut, Storrs, CT, 06269, USA
| | - Ilya Sochnikov
- Physics Department, University of Connecticut, Storrs, CT, 06269, USA
- Institute of Material Science, University of Connecticut, Storrs, CT, 06269, USA
| | - Philip J Ryan
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA
- School of Physical Sciences, Dublin City University, Dublin 9, D09 V209, Ireland
| | - Daniel Haskel
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Fazel Tafti
- Departments of Physics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA, 02467, USA
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Abstract
We studied the electrical transport of Fe4+δSe5 single-crystal nanowires exhibiting √5 × √5 Fe-vacancy order and mixed valence of Fe. Fe4+δSe5 compound has been identified as the parent phase of FeSe superconductor. A first-order metal-insulator (MI) transition of transition temperature T MI ∼ 28 K is observed at zero magnetic fields (B). Colossal positive magnetoresistance emerges, resulting from the magnetic field-dependent MI transition. T MI demonstrates anisotropic magnetic field dependence with the preferred orientation along the c axis. At temperature T < ∼17 K, the state of near-magnetic field-independent resistance, which is due to spin polarized even at zero fields, preserves under magnetic fields up to B = 9 T. The Arrhenius law shift of the transition on the source-drain frequency dependence reveals that it is a nonoxide compound with the Verwey-like electronic correlation. The observation of the magnetic field-independent magnetoresistance at low temperature suggests it is in a charge-ordered state below T ∼ 17 K. The results of the field orientation measurements indicate that the spin-orbital coupling is crucial in √5 × √5 Fe vacancy-ordered Fe4+δSe5 at low temperatures. Our findings provide valuable information to better understand the orbital nature and the interplay between the MI transition and superconductivity in FeSe-based materials.
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Affiliation(s)
- Keng-Yu Yeh
- Institute of Physics, Academia Sinica, 115 Taipei, Taiwan
- Taiwan International Graduate Student Program, Academia Sinica, 115 Taipei, Taiwan
- Department of Engineering and System Science, National Tsing Hua University, 300 Hsinchu, Taiwan
| | - Tung-Sheng Lo
- Institute of Physics, Academia Sinica, 115 Taipei, Taiwan
| | - Phillip M Wu
- Institute of Physics, Academia Sinica, 115 Taipei, Taiwan;
- BitSmart LLC, San Mateo, CA 94403
| | - Kuei-Shu Chang-Liao
- Department of Engineering and System Science, National Tsing Hua University, 300 Hsinchu, Taiwan
| | - Ming-Jye Wang
- Institute of Physics, Academia Sinica, 115 Taipei, Taiwan
- Institute of Astronomy and Astrophysics, Academia Sinica, 115 Taipei, Taiwan
| | - Maw-Kuen Wu
- Institute of Physics, Academia Sinica, 115 Taipei, Taiwan;
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16
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Lukose R, Plausinaitiene V, Vagner M, Zurauskiene N, Kersulis S, Kubilius V, Motiejuitis K, Knasiene B, Stankevic V, Saltyte Z, Skapas M, Selskis A, Naujalis E. Relation between thickness, crystallite size and magnetoresistance of nanostructured La 1- x Sr x Mn y O 3±δ films for magnetic field sensors. Beilstein J Nanotechnol 2019; 10:256-261. [PMID: 30746319 PMCID: PMC6350892 DOI: 10.3762/bjnano.10.24] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 12/21/2018] [Indexed: 06/09/2023]
Abstract
In the present study the advantageous pulsed-injection metal organic chemical vapour deposition (PI-MOCVD) technique was used for the growth of nanostructured La1- x Sr x Mn y O3±δ (LSMO) films on ceramic Al2O3 substrates. The compositional, structural and magnetoresistive properties of the nanostructured manganite were changed by variation of the processing conditions: precursor solution concentration, supply frequency and number of supply sources during the PI-MOCVD growth process. The results showed that the thick (≈400 nm) nanostructured LSMO films, grown using an additional supply source of precursor solution in an exponentially decreasing manner, exhibit the highest magnetoresistance and the lowest magnetoresistance anisotropy. The possibility to use these films for the development of magnetic field sensors operating at room temperature is discussed.
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Affiliation(s)
- Rasuole Lukose
- Department of Material Science and Electrical Engineering, Center for Physical Sciences and Technology, Sauletekio av. 3, LT-10257 Vilnius, Lithuania
| | - Valentina Plausinaitiene
- Department of Material Science and Electrical Engineering, Center for Physical Sciences and Technology, Sauletekio av. 3, LT-10257 Vilnius, Lithuania
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko 24, LT- 03225 Vilnius, Lithuania
| | - Milita Vagner
- Department of Material Science and Electrical Engineering, Center for Physical Sciences and Technology, Sauletekio av. 3, LT-10257 Vilnius, Lithuania
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko 24, LT- 03225 Vilnius, Lithuania
| | - Nerija Zurauskiene
- Department of Material Science and Electrical Engineering, Center for Physical Sciences and Technology, Sauletekio av. 3, LT-10257 Vilnius, Lithuania
- Department of Electrical Engineering, Faculty of Electronics, Vilnius Gediminas Technical University, Naugarduko 21, LT- 03227 Vilnius, Lithuania
| | - Skirmantas Kersulis
- Department of Material Science and Electrical Engineering, Center for Physical Sciences and Technology, Sauletekio av. 3, LT-10257 Vilnius, Lithuania
| | - Virgaudas Kubilius
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko 24, LT- 03225 Vilnius, Lithuania
| | - Karolis Motiejuitis
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko 24, LT- 03225 Vilnius, Lithuania
| | - Birute Knasiene
- Department of Metrology, Center for Physical Sciences and Technology, Sauletekio av. 3, LT-10257 Vilnius, Lithuania
| | - Voitech Stankevic
- Department of Material Science and Electrical Engineering, Center for Physical Sciences and Technology, Sauletekio av. 3, LT-10257 Vilnius, Lithuania
- Department of Electrical Engineering, Faculty of Electronics, Vilnius Gediminas Technical University, Naugarduko 21, LT- 03227 Vilnius, Lithuania
| | - Zita Saltyte
- Department of Material Science and Electrical Engineering, Center for Physical Sciences and Technology, Sauletekio av. 3, LT-10257 Vilnius, Lithuania
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko 24, LT- 03225 Vilnius, Lithuania
| | - Martynas Skapas
- Department of Characterization of Materials Structure, Center for Physical Sciences and Technology, Sauletekio av. 3, LT-10257 Vilnius, Lithuania
| | - Algirdas Selskis
- Department of Characterization of Materials Structure, Center for Physical Sciences and Technology, Sauletekio av. 3, LT-10257 Vilnius, Lithuania
| | - Evaldas Naujalis
- Department of Metrology, Center for Physical Sciences and Technology, Sauletekio av. 3, LT-10257 Vilnius, Lithuania
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Lloyd-Hughes J, Mosley CDW, Jones SPP, Lees MR, Chen A, Jia QX, Choi EM, MacManus-Driscoll JL. Colossal Terahertz Magnetoresistance at Room Temperature in Epitaxial La 0.7Sr 0.3MnO 3 Nanocomposites and Single-Phase Thin Films. Nano Lett 2017; 17:2506-2511. [PMID: 28287748 DOI: 10.1021/acs.nanolett.7b00231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Colossal magnetoresistance (CMR) is demonstrated at terahertz (THz) frequencies by using terahertz time-domain magnetospectroscopy to examine vertically aligned nanocomposites (VANs) and planar thin films of La0.7Sr0.3MnO3. At the Curie temperature (room temperature), the THz conductivity of the VAN was dramatically enhanced by over 2 orders of magnitude under the application of a magnetic field with a non-Drude THz conductivity that increased with frequency. The direct current (dc) CMR of the VAN is controlled by extrinsic magnetotransport mechanisms such as spin-polarized tunneling between nanograins. In contrast, we find that THz CMR is dominated by intrinsic, intragrain transport: the mean free path was smaller than the nanocolumn size, and the planar thin-film exhibited similar THz CMR to the VAN. Surprisingly, the observed colossal THz magnetoresistance suggests that the magnetoresistance can be large for alternating current motion on nanometer length scales, even when the magnetoresistance is negligible on the macroscopic length scales probed by dc transport. This suggests that colossal magnetoresistance at THz frequencies may find use in nanoelectronics and in THz optical components controlled by magnetic fields. The VAN can be scaled in thickness while retaining a high structural quality and offers a larger THz CMR at room temperature than the planar film.
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Affiliation(s)
- J Lloyd-Hughes
- Department of Physics, University of Warwick , Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
| | - C D W Mosley
- Department of Physics, University of Warwick , Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
| | - S P P Jones
- Department of Physics, Clarendon Laboratory, University of Oxford , Parks Road, Oxford, OX1 3PU, United Kingdom
| | - M R Lees
- Department of Physics, University of Warwick , Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
| | - A Chen
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Q X Jia
- Materials Design and Innovation, School of Engineering and Applied Sciences, University at Buffalo , 311 Bell Hall, Buffalo, New York 14260-5030, United States
| | - E-M Choi
- Department of Materials Science, University of Cambridge , 27 Charles Babbage Road, Cambridge, CB3 0FS, United Kingdom
| | - J L MacManus-Driscoll
- Department of Materials Science, University of Cambridge , 27 Charles Babbage Road, Cambridge, CB3 0FS, United Kingdom
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18
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Baldini M, Muramatsu T, Sherafati M, Mao HK, Malavasi L, Postorino P, Satpathy S, Struzhkin VV. Origin of colossal magnetoresistance in LaMnO3 manganite. Proc Natl Acad Sci U S A 2015; 112:10869-72. [PMID: 26272923 DOI: 10.1073/pnas.1424866112] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Phase separation is a crucial ingredient of the physics of manganites; however, the role of mixed phases in the development of the colossal magnetoresistance (CMR) phenomenon still needs to be clarified. We report the realization of CMR in a single-valent LaMnO3 manganite. We found that the insulator-to-metal transition at 32 GPa is well described using the percolation theory. Pressure induces phase separation, and the CMR takes place at the percolation threshold. A large memory effect is observed together with the CMR, suggesting the presence of magnetic clusters. The phase separation scenario is well reproduced, solving a model Hamiltonian. Our results demonstrate in a clean way that phase separation is at the origin of CMR in LaMnO3.
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19
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Vila-Fungueiriño JM, Rivas-Murias B, Rodríguez-González B, Txoperena O, Ciudad D, Hueso LE, Lazzari M, Rivadulla F. Room-temperature ferromagnetism in thin films of LaMnO3 deposited by a chemical method over large areas. ACS Appl Mater Interfaces 2015; 7:5410-5414. [PMID: 25667996 DOI: 10.1021/am508941j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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
Hole-doping into the Mott insulator LaMnO3 results in a very rich magneto-electric phase diagram, including colossal magnetoresistance and different types of charge and orbital ordering. On the other hand, LaMnO3 presents an important catalytic activity for oxygen reduction, which is fundamental for increasing the efficiency of solid-oxide fuel cells and other energy-conversion devices. In this work, we report the chemical solution (water-based) synthesis of high-quality epitaxial thin films of LaMnO3, free of defects at square-centimeter scales, and compatible with standard microfabrication techniques. The films show a robust ferromagnetic moment and large magnetoresistance at room temperature. Through a comparison with films grown by pulsed laser deposition, we show that the quasi-equilibrium growth conditions characteristic of this chemical process can be exploited to tune new functionalities of the material.
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Affiliation(s)
- José Manuel Vila-Fungueiriño
- Centro de Investigación en Química Biológica y Materiales Moleculares (CIQUS), Universidad de Santiago de Compostela , 15782 Santiago de Compostela, Spain
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20
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Yang JC, He Q, Zhu YM, Lin JC, Liu HJ, Hsieh YH, Wu PC, Chen YL, Lee SF, Chin YY, Lin HJ, Chen CT, Zhan Q, Arenholz E, Chu YH. Magnetic mesocrystal-assisted magnetoresistance in manganite. Nano Lett 2014; 14:6073-6079. [PMID: 25313666 DOI: 10.1021/nl5019172] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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
Mesocrystal, a new class of crystals as compared to conventional and well-known single crystals and polycrystalline systems, has captured significant attention in the past decade. Recent studies have been focused on the advance of synthesis mechanisms as well as the potential on device applications. In order to create further opportunities upon functional mesocrystals, we fabricated a self-assembled nanocomposite composed of magnetic CoFe2O4 mesocrystal in Sr-doped manganites. This combination exhibits intriguing structural and magnetic tunabilities. Furthermore, the antiferromagnetic coupling of the mesocrystal and matrix has induced an additional magnetic perturbation to spin-polarized electrons, resulting in a significantly enhanced magnetoresistance in the nanocomposite. Our work demonstrates a new thought toward the enhancement of intrinsic functionalities assisted by mesocrystals and advanced design of novel mesocrystal-embedded nanocomposites.
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Affiliation(s)
- Jan-Chi Yang
- Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 300, Taiwan
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