1. Sizable spin-transfer torque in Bi/Ni80Fe20 bilayer film
- Author
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Matsushima, M., Miwa, S., Sakamoto, S., Shinjo, T., Ohshima, R., Ando, Y., Fuseya, Y., and Shiraishi, M.
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics ,Quantum Physics - 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., Comment: 17 pages, 3 figures (to appear in Applied Physics Letters)
- Published
- 2020
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