中国物理B ›› 2020, Vol. 29 ›› Issue (11): 117504-.doi: 10.1088/1674-1056/abb666

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Ying-Yi Tian(田颖异)1, Shuan-Hu Wang(王拴虎)1,†(), Gang Li(李刚)3, Hao Li(李豪)1, Shu-Qin Li(李书琴)1, Yang Zhao(赵阳)1, Xiao-Min Cui(崔晓敏)1, Jian-Yuan Wang(王建元)1, Lv-Kuan Zou(邹吕宽)2, Ke-Xin Jin(金克新)1,‡()   

  • 收稿日期:2020-08-12 修回日期:2020-08-31 接受日期:2020-09-09 出版日期:2020-11-05 发布日期:2020-11-03

Magnetization reorientation induced by spin–orbit torque in YIG/Pt bilayers

Ying-Yi Tian(田颖异)1, Shuan-Hu Wang(王拴虎)1, †, Gang Li(李刚)3, Hao Li(李豪)1, Shu-Qin Li(李书琴)1, Yang Zhao(赵阳)1, Xiao-Min Cui(崔晓敏)1, Jian-Yuan Wang(王建元)1, Lv-Kuan Zou(邹吕宽)2, and Ke-Xin Jin(金克新)1,, ‡   

  1. 1 Shaanxi Key Laboratory of Condensed Matter Structures and Properties and MOE Key Laboratory of Materials Physics and Chemistry under Extraordinary Conditions, School of Science, Northwestern Polytechnical University, Xi’an 710072, China
    2 High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China
    3 School of Science and Technology, Tianjin University of Finance and Economics, Tianjin 300222, China
  • Received:2020-08-12 Revised:2020-08-31 Accepted:2020-09-09 Online:2020-11-05 Published:2020-11-03
  • Contact: †Corresponding author. E-mail: shwang2015@nwpu.edu.cn ‡Corresponding author. E-mail: jinkx@nwpu.edu
  • Supported by:
    the Natural Science Foundation of Shaanxi Province, China (Grant No. 2020JM-088), the National Natural Science Foundation of China (Grant Nos. 51572222, 51701158, and 51872241), and the Fundamental Research Funds for the Central Universities, China (Grant Nos. 3102017jc01001 and 310201911cx044).

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Abstract:

In this work, we report the reorientation of magnetization by spin–orbit torque (SOT) in YIG/Pt bilayers. The SOT is investigated by measuring the spin Hall magnetoresistance (SMR), which is highly sensitive to the direction of magnetic moment of YIG. An external in-plane rotating magnetic field which is applied to the YIG/Pt bilayers, and the evolutions of SMR under different injected currents in the Pt layer, result in deviation of SMR curve from the standard shape. We conclude that the SOT caused by spin accumulation near the interface between YIG and Pt can effectively reorient the in-plane magnetic moment of YIG. This discovery provides an effective way to modulate YIG magnetic moments by electrical methods.

Key words: spin-orbit torque, yttrium iron garnet, reorientation of magnetization, spin Hall magnetoresistance