Spin–orbit torque (SOT), exerted to a ferromagnet from an adjacent non-magnetic layer, has been widely considered as a promising strategy to realize spintronic devices with high energy efficiency, endurance, and speed. Much effort has been devoted to the search for materials and structures that can generate strong SOTs. Recent investigations showed that two-dimensional (2D) transition metal dichalcogenides provide the potential to produce strong enough SOTs to manipulate the magnetic devices due to rich spin-dependent properties. Here, we present the study of SOT in WTe2/ferromagnet with perpendicular magnetic anisotropy devices, and an enhancement of SOT efficiency with the thickness of WTe2 is observed, which may be ascribed to the spin absorption at the WTe2/Ta interface and the spin Hall effect. This work demonstrates the possibility of manipulating magnetization by 2D materials and an avenue for engineering spintronic devices based on 2D materials.
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1 February 2021
Research Article|
February 02 2021
Enhancement of spin–orbit torque in WTe2/perpendicular magnetic anisotropy heterostructures Available to Purchase
Special Collection:
Spin-Orbit Torque (SOT): Materials, Physics, and Devices
Wenxing Lv;
Wenxing Lv
1
Physics Laboratory, Industrial Training Center, Shenzhen Polytechnic
, Shenzhen, Guangdong 518055, People's Republic of China
2
Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, CAS
, Suzhou, Jiangsu 215123, People's Republic of China
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Hongwei Xue;
Hongwei Xue
3
Department of Optical Science and Engineering, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), and Shanghai Ultra-Precision Optical Manufacturing Engineering Center, Fudan University
, Shanghai 200433, People's Republic of China
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Jialin Cai
;
Jialin Cai
2
Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, CAS
, Suzhou, Jiangsu 215123, People's Republic of China
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Qian Chen;
Qian Chen
2
Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, CAS
, Suzhou, Jiangsu 215123, People's Republic of China
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Baoshun Zhang
;
Baoshun Zhang
2
Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, CAS
, Suzhou, Jiangsu 215123, People's Republic of China
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Zongzhi Zhang
;
Zongzhi Zhang
a)
3
Department of Optical Science and Engineering, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), and Shanghai Ultra-Precision Optical Manufacturing Engineering Center, Fudan University
, Shanghai 200433, People's Republic of China
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Zhongming Zeng
Zhongming Zeng
a)
2
Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, CAS
, Suzhou, Jiangsu 215123, People's Republic of China
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Wenxing Lv
1,2
Hongwei Xue
3
Jialin Cai
2
Qian Chen
2
Baoshun Zhang
2
Zongzhi Zhang
3,a)
Zhongming Zeng
2,a)
1
Physics Laboratory, Industrial Training Center, Shenzhen Polytechnic
, Shenzhen, Guangdong 518055, People's Republic of China
2
Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, CAS
, Suzhou, Jiangsu 215123, People's Republic of China
3
Department of Optical Science and Engineering, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), and Shanghai Ultra-Precision Optical Manufacturing Engineering Center, Fudan University
, Shanghai 200433, People's Republic of China
Note: This paper is part of the Special Topic on Spin-Orbit Torque (SOT): Materials, Physics and Devices.
Appl. Phys. Lett. 118, 052406 (2021)
Article history
Received:
November 30 2020
Accepted:
January 21 2021
Citation
Wenxing Lv, Hongwei Xue, Jialin Cai, Qian Chen, Baoshun Zhang, Zongzhi Zhang, Zhongming Zeng; Enhancement of spin–orbit torque in WTe2/perpendicular magnetic anisotropy heterostructures. Appl. Phys. Lett. 1 February 2021; 118 (5): 052406. https://doi.org/10.1063/5.0039069
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