Spin-orbit torques in perpendicularly magnetized Ir22Mn78/Co20Fe60B20/MgO multilayer

Di Wu, Guoqiang Yu, Ching Tzu Chen, Seyed Armin Razavi, Qiming Shao, Xiang Li, Bingcheng Zhao, Kin L. Wong, Congli He, Zongzhi Zhang, Pedram Khalili Amiri, Kang L. Wang

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40 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number222401
JournalApplied Physics Letters
Volume109
Issue number22
DOIs
StatePublished - Nov 28 2016

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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