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 journalArticlepeer-review

8 Scopus citations


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 languageEnglish (US)
Article number217702
JournalPhysical review letters
Issue number21
StatePublished - May 27 2022

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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