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Zhao W, Huang W, Liu C, Hou C, Chen Z, Yin Y, Li X. Electric-Field-Controlled Nonvolatile Magnetization Rotation and Magnetoresistance Effect in Co/Cu/Ni Spin Valves on Piezoelectric Substrates. ACS APPLIED MATERIALS & INTERFACES 2018; 10:21390-21397. [PMID: 29873228 DOI: 10.1021/acsami.8b03761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Electric-field control of magnetism is a key issue for the future development of low-power spintronic devices. By utilizing the opposite strain responses of the magnetic anisotropies in Co and Ni films, a Co/Cu/Ni/0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) spin-valve/piezoelectric heterostructure with ∼7 nm Cu spacer layer was properly designed and fabricated. The purely electric-field-controlled nonvolatile and reversible magnetization rotations in the Co free layer were achieved, whereas the magnetization of the Ni fixed layer was almost unchanged. Accordingly, not only the electroresistance but also the electric-field-tuned magnetoresistance effects were obtained, and more importantly at least six nonvolatile magnetoresistance states in the strain-tuned spin valve were achieved by setting the PMN-PT into different nonvolatile piezo-strain states. These findings highlight potential strategies for designing electric-field-driven multistate spintronic devices.
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Affiliation(s)
- Wenbo Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics , University of Science and Technology of China , Hefei 230026 , China
| | - Weichuan Huang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics , University of Science and Technology of China , Hefei 230026 , China
| | - Chuanchuan Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics , University of Science and Technology of China , Hefei 230026 , China
| | - Chuangming Hou
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics , University of Science and Technology of China , Hefei 230026 , China
| | - Zhiwei Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics , University of Science and Technology of China , Hefei 230026 , China
| | - Yuewei Yin
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics , University of Science and Technology of China , Hefei 230026 , China
| | - Xiaoguang Li
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics , University of Science and Technology of China , Hefei 230026 , China
- Collaborative Innovation Center of Advanced Microstructures , Nanjing 210093 , China
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Wilson RB, Cahill DG. Experimental validation of the interfacial form of the Wiedemann-Franz law. PHYSICAL REVIEW LETTERS 2012; 108:255901. [PMID: 23004623 DOI: 10.1103/physrevlett.108.255901] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 05/16/2012] [Indexed: 06/01/2023]
Abstract
The thermal conductivity of four Pd/Ir metal multilayers of total thickness 390 nm with 40, 80, 120, and 200 Pd/Ir interfaces are measured at temperatures between 78 and 295 K using time-domain thermoreflectance. The thermal interface conductance G of the Pd/Ir interface is derived from the differences in thermal conductivity between the multilayers. A comparison of G to previously reported data for the electronic specific resistance of the Pd/Ir interface at 4 K supports the validity of the interfacial form of the Wiedemann-Franz law. The Lorenz number deduced from this comparison is within 10% of the Sommerfeld value at all temperatures, well within the experimental uncertainties of ≈ 20%.
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Affiliation(s)
- R B Wilson
- Department of Materials Science and Engineering, and Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA
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Barthélémy A, Fert A, Petroff F. Chapter 1 Giant magnetoresistance in magnetic multilayers. HANDBOOK OF MAGNETIC MATERIALS 1999. [DOI: 10.1016/s1567-2719(99)12005-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Hsu SY, Holody P, Loloee R, Rittner JM, Pratt WP, Schroeder PA. Spin-diffusion lengths of Cu1-xNix using current perpendicular to plane magnetoresistance measurements of magnetic multilayers. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:9027-9030. [PMID: 9984624 DOI: 10.1103/physrevb.54.9027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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