Spin-orbit torques of three spin polarizations in magnetic trilayers

Jeongchun Ryu,Ryan Thompson,Jae Yeol Park,Seok-Jong Kim,Gaeun Choi,Jaimin Kang,Han Beom Jeong,Makoto Kohda,Jong Min Yuk,Junsaku Nitta,Kyung-Jin Lee,Byong-Guk Park

2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers)（2023）

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摘要

Three spin polarizations of spin-orbit torques are theoretically available in ferromagnet/normal metal/ferromagnet trilayers. We report the quantification of spin-orbit torques of these spin polarizations via harmonic Hall voltage measurement. Furthermore, we show that using all three polarizations reduces the field-free spin-orbit torque (SOT) switching current of a perpendicular magnetization by employing a bottom ferromagnet with a tilted easy-axis in trilayer systems.

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关键词

spin current,spin-orbit torque,magnetic memory device

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