Sign Change of Spin-Orbit Torque in Pt/NiO/CoFeB Structures

Dapeng Zhu; Tianrui Zhang; Xiao Fu; Runrun Hao; Amir Hamzić; Huaiwen Yang; Xueying Zhang; Hui Zhang; Ao Du; Danrong Xiong; Kewen Shi; Shishen Yan; Shufeng Zhang; Albert Fert; Weisheng Zhao

doi:10.1103/PhysRevLett.128.217702

Sign Change of Spin-Orbit Torque in Pt/NiO/CoFeB Structures

Dapeng Zhu, Tianrui Zhang, Xiao Fu, Runrun Hao, Amir Hamzić, Huaiwen Yang, Xueying Zhang, Hui Zhang, Ao Du, Danrong Xiong, Kewen Shi, Shishen Yan, Shufeng Zhang, Albert Fert, Weisheng Zhao

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

Antiferromagnetic insulators have recently been proved to support spin current efficiently. Here, we report the dampinglike spin-orbit torque (SOT) in Pt/NiO/CoFeB has a strong temperature dependence and reverses the sign below certain temperatures, which is different from the slight variation with temperature in the Pt/CoFeB bilayer. The negative dampinglike SOT at low temperatures is proposed to be mediated by the magnetic interactions that tie with the "exchange bias"in Pt/NiO/CoFeB, in contrast to the thermal-magnon-mediated scenario at high temperatures. Our results highlight the promise to control the SOT through tuning the magnetic structure in multilayers.

Original language	English (US)
Article number	217702
Journal	Physical review letters
Volume	128
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.128.217702
State	Published - May 27 2022
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.128.217702

Cite this

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title = "Sign Change of Spin-Orbit Torque in Pt/NiO/CoFeB Structures",

abstract = "Antiferromagnetic insulators have recently been proved to support spin current efficiently. Here, we report the dampinglike spin-orbit torque (SOT) in Pt/NiO/CoFeB has a strong temperature dependence and reverses the sign below certain temperatures, which is different from the slight variation with temperature in the Pt/CoFeB bilayer. The negative dampinglike SOT at low temperatures is proposed to be mediated by the magnetic interactions that tie with the {"}exchange bias{"}in Pt/NiO/CoFeB, in contrast to the thermal-magnon-mediated scenario at high temperatures. Our results highlight the promise to control the SOT through tuning the magnetic structure in multilayers.",

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T1 - Sign Change of Spin-Orbit Torque in Pt/NiO/CoFeB Structures

AU - Zhu, Dapeng

AU - Zhang, Tianrui

AU - Fu, Xiao

AU - Hao, Runrun

AU - Hamzić, Amir

AU - Yang, Huaiwen

AU - Zhang, Xueying

AU - Zhang, Hui

AU - Du, Ao

AU - Xiong, Danrong

AU - Shi, Kewen

AU - Yan, Shishen

AU - Zhang, Shufeng

AU - Fert, Albert

AU - Zhao, Weisheng

PY - 2022/5/27

Y1 - 2022/5/27

N2 - Antiferromagnetic insulators have recently been proved to support spin current efficiently. Here, we report the dampinglike spin-orbit torque (SOT) in Pt/NiO/CoFeB has a strong temperature dependence and reverses the sign below certain temperatures, which is different from the slight variation with temperature in the Pt/CoFeB bilayer. The negative dampinglike SOT at low temperatures is proposed to be mediated by the magnetic interactions that tie with the "exchange bias"in Pt/NiO/CoFeB, in contrast to the thermal-magnon-mediated scenario at high temperatures. Our results highlight the promise to control the SOT through tuning the magnetic structure in multilayers.

AB - Antiferromagnetic insulators have recently been proved to support spin current efficiently. Here, we report the dampinglike spin-orbit torque (SOT) in Pt/NiO/CoFeB has a strong temperature dependence and reverses the sign below certain temperatures, which is different from the slight variation with temperature in the Pt/CoFeB bilayer. The negative dampinglike SOT at low temperatures is proposed to be mediated by the magnetic interactions that tie with the "exchange bias"in Pt/NiO/CoFeB, in contrast to the thermal-magnon-mediated scenario at high temperatures. Our results highlight the promise to control the SOT through tuning the magnetic structure in multilayers.

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Sign Change of Spin-Orbit Torque in Pt/NiO/CoFeB Structures

Abstract

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