Magnetization switching by spin–orbit torques in perpendicular Pt/Co epitaxial multilayers
Abstract
The Pt/Co/MgO/Cr multilayers were prepared by the molecular beam epitaxy (MBE) method, and the current-induced spin-orbit torque (SOT) in the epitaxial (111)-oriented Pt sample was characterized by Hall voltage harmonic measurements. The spin torque efficiency (ξSOT) was characterized, and the obtained ξSOT is 0.052. The SOT-driven complete magnetization reversal with the assistance of an in-plane external magnetic field was demonstrated by electrical measurements. The magneto-optic Kerr effect (MOKE) microscope measurement indicates that the magnetization reversal is accomplished by magnetic domain nucleation and domain wall motion. These results further help us to understand the SOT switching in the epitaxial Pt-based magnetic heterostructure and may facilitate its applications in spintronic devices.
Article Details
Journal Info
Journal of Applied Physics
American Institute of Physics
Authors (17)
Yuping Huo
School of Physics and Astronomy, Beijing Normal University 1 , Beijing 100875,
Yunchi Zhao
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences 3 , Beijing 100190,
Qiqi Zhang
Congli He
School of Physics and Astronomy, Beijing Normal University 1 , Beijing 100875,
Hongjun Xu
Baoshan Cui
Key Laboratory for Magnetism and Magnetic Functional Materials of Ministry of Education, School of Physical Science and Technology, Lanzhou University , Lanzhou,
Jinwu Wei
School of Physical Science and Technology 1 , Lanzhou University, Lanzhou 730000,
Jie Qi
Chaoqun Hu
Yu Zhang
Xiangya Hospital, Central South University Changsha China
Chunli Zhao
Xiaoyu Xiong
Guoqiang Yu
Shipeng Shen
Ruifen Dou
School of Physics and Astronomy, Beijing Normal University 1 , Beijing 100875,
Hongxiang Wei
College of Chemistry and Pingyuan Laboratory Zhengzhou University Zhengzhou People's Republic of China
Shouguo Wang