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arXiv · 2007.09830

Sizable spin-transfer torque in Bi/Ni80Fe20 bilayer film

M. Matsushima·S. Miwa·S. Sakamoto·T. Shinjo·R. Ohshima·Y. Ando·Y. Fuseya·M. Shiraishi
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Abstract

The search for efficient spin conversion in Bi has attracted great attention in spin-orbitronics. In the present work, we employ spin-torque ferromagnetic resonance to investigate spin conversion in Bi/Ni80Fe20(Py) bilayer films with continuously varying Bi thickness. In contrast with previous studies, sizable spin-transfer torque (i.e., a sizable spin-conversion effect) is observed in Bi/Py bilayer film. Considering the absence of spin conversion in Bi/yttrium-iron-garnet bilayers and the enhancement of spin conversion in Bi-doped Cu, the present results indicate the importance of material combinations to generate substantial spin-conversion effects in Bi.

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M. Matsushima, S. Miwa, S. Sakamoto, T. Shinjo, R. Ohshima, Y. Ando, Y. Fuseya, M. Shiraishi. 2020-07-20. Sizable spin-transfer torque in Bi/Ni80Fe20 bilayer film. https://doi.org/10.1063/5.0009798

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