Open AccessSpin-orbit torques in perpendicularly magnetized Ir22Mn78/Co20Fe60B20/MgO multilayer
Author(s) -
Di Wu,
Guoqiang Yu,
Ching-Tzu Chen,
Seyed Armin Razavi,
Qiming Shao,
Xiang Li,
Bingcheng Zhao,
Kin Wong,
Congli He,
Zongzhi Zhang,
Pedram Khalili Amiri,
Kang L. Wang
Publication year - 2016
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.4968785
Subject(s) - condensed matter physics , magnetization , perpendicular , domain wall (magnetism) , kerr effect , spin (aerodynamics) , orbit (dynamics) , antiferromagnetism , torque , field (mathematics) , nucleation , spin hall effect , materials science , magnetic field , physics , spin polarization , nonlinear system , electron , geometry , mathematics , quantum mechanics , pure mathematics , engineering , thermodynamics , aerospace engineering
The current-induced spin-orbit torques (SOTs) in the perpendicularly magnetized Ir22Mn78/Co20Fe60B20/MgO structures are investigated. The damping- and field-like torques are characterized using a harmonic technique. The spin Hall angle of Ir22Mn78 is determined to be θSHE = +0.057 ± 0.002. The SOT-driven magnetization switching is also demonstrated with the assistance of an external in-plane field. Furthermore, the magneto-optical Kerr effect imaging experiments show that the magnetization switching is realized through domain nucleation and domain wall motion. These results may promise potential practical applications in high-performance SOT devices based on the antiferromagnetic materials.
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