中国物理B ›› 2020, Vol. 29 ›› Issue (8): 87102-087102.doi: 10.1088/1674-1056/ab9292

• SPECIAL TOPIC—Ultracold atom and its application in precision measurement • 上一篇    下一篇

Giant interface spin-orbit torque in NiFe/Pt bilayers

Shu-Fa Li(李树发), Tao Zhu(朱涛)   

  1. 1 College of Electronics and Information Engineering, Guangdong Ocean University, Zhanjiang 524088, China;
    2 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2020-04-20 修回日期:2020-05-11 出版日期:2020-08-05 发布日期:2020-08-05
  • 通讯作者: Tao Zhu E-mail:tzhu@iphy.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11574375).

Giant interface spin-orbit torque in NiFe/Pt bilayers

Shu-Fa Li(李树发)1, Tao Zhu(朱涛)2   

  1. 1 College of Electronics and Information Engineering, Guangdong Ocean University, Zhanjiang 524088, China;
    2 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2020-04-20 Revised:2020-05-11 Online:2020-08-05 Published:2020-08-05
  • Contact: Tao Zhu E-mail:tzhu@iphy.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11574375).

摘要: The current-induced spin-orbit torque (SOT) plays a dominant role to manipulate the magnetization in a heavy metal/ferromagnetic metal bilayer. We separate the contributions of interfacial and bulk spin-orbit coupling (SOC) to the effective field of field-like SOT in a typical NiFe/Pt bilayer by planar Hall effect (PHE). The effective field from interfacial SOC is directly measured at the transverse PHE configuration. Then, at the longitudinal configuration, the effective field from bulk SOC is determined, which is much smaller than that from interfacial SOC. The giant interface SOT in NiFe/Pt bilayers suggests that further analysis of interfacial effects on the current-induced manipulation of magnetization is necessary.

关键词: spin-orbit coupling, planar Hall effect, spin-orbit torques, spin Hall effect

Abstract: The current-induced spin-orbit torque (SOT) plays a dominant role to manipulate the magnetization in a heavy metal/ferromagnetic metal bilayer. We separate the contributions of interfacial and bulk spin-orbit coupling (SOC) to the effective field of field-like SOT in a typical NiFe/Pt bilayer by planar Hall effect (PHE). The effective field from interfacial SOC is directly measured at the transverse PHE configuration. Then, at the longitudinal configuration, the effective field from bulk SOC is determined, which is much smaller than that from interfacial SOC. The giant interface SOT in NiFe/Pt bilayers suggests that further analysis of interfacial effects on the current-induced manipulation of magnetization is necessary.

Key words: spin-orbit coupling, planar Hall effect, spin-orbit torques, spin Hall effect

中图分类号:  (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)

  • 71.70.Ej
72.25.Ba (Spin polarized transport in metals) 75.76.+j (Spin transport effects)