We found that the exposure of a Co/Pt bilayer to air will result in a trace amount of oxidation at the Co/Pt interface, while the Pt layer is immune to oxidation. The appearance of CoOx results in a negative spin Hall magnetoresistance and unconventional spin–orbit torques (SOTs), which are observed through temperature-dependent transport and spin-torque ferromagnetic resonance measurements. These results can be understood by considering CoOx as an individual magnetic layer between Pt and Co, with two important characteristics: (1) its magnetization is aligned in the plane that is perpendicular to the magnetization of Co and (2) the spin transparency of CoOx increases with increasing temperature. These results help us understand the features of spin transport at the interface when oxidation occurs and further indicate that trace amounts of oxidation can be a highly effective method to control SOT in magnetic heterostructures.
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29 March 2021
Research Article|
April 02 2021
Impact of trace amounts of interfacial oxidation on the spin–orbit torque in the Co/Pt heterostructures Available to Purchase
Special Collection:
Spin-Orbit Torque (SOT): Materials, Physics, and Devices
Xiaoyu Feng;
Xiaoyu Feng
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
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Jiguang Yao;
Jiguang Yao
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
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Yongwei Cui;
Yongwei Cui
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
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Peng Zhang;
Peng Zhang
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
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Qiaoning Bai;
Qiaoning Bai
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
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Li Xi
;
Li Xi
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
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Jiangwei Cao
;
Jiangwei Cao
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
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Desheng Xue;
Desheng Xue
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
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Xiaolong Fan
Xiaolong Fan
a)
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
Xiaoyu Feng
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
Jiguang Yao
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
Yongwei Cui
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
Peng Zhang
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
Qiaoning Bai
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
Jiangwei Cao
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
Desheng Xue
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
Xiaolong Fan
a)
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
, Lanzhou 730000, People's Republic of China
a)Author to whom correspondence should be addressed: [email protected]
Note: This paper is part of the Special Topic on Spin-Orbit Torque (SOT): Materials, Physics and Devices.
Appl. Phys. Lett. 118, 132410 (2021)
Article history
Received:
November 29 2020
Accepted:
March 19 2021
Citation
Xiaoyu Feng, Jiguang Yao, Yongwei Cui, Peng Zhang, Qiaoning Bai, Li Xi, Jiangwei Cao, Desheng Xue, Xiaolong Fan; Impact of trace amounts of interfacial oxidation on the spin–orbit torque in the Co/Pt heterostructures. Appl. Phys. Lett. 29 March 2021; 118 (13): 132410. https://doi.org/10.1063/5.0039000
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