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

doi:10.1063/5.0009798

Sizable spin-transfer torque in Bi/Ni80Fe20 bilayer film

Mesoscale and Nanoscale Physics 2020-08-26 v1 Quantum Physics

Authors: 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.

Keywords

spin-transfer torque spin conversion Bi/Ni80Fe20 bilayer spin-orbitronics ferromagnetic resonance material combination

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@article{arxiv.2007.09830,
  title  = {Sizable spin-transfer torque in Bi/Ni80Fe20 bilayer film},
  author = {M. Matsushima and S. Miwa and S. Sakamoto and T. Shinjo and R. Ohshima and Y. Ando and Y. Fuseya and M. Shiraishi},
  journal= {arXiv preprint arXiv:2007.09830},
  year   = {2020}
}

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17 pages, 3 figures (to appear in Applied Physics Letters)

Sizable spin-transfer torque in Bi/Ni80Fe20 bilayer film

Abstract

Keywords

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