Crossover of the intrinsic spin Hall effect in the presence of lattice expansion

Nozomi Soya, Hiroki Hayashi, Takashi Harumoto, Tenghua Gao, Satoshi Haku, Kazuya Ando

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We report the robustness of the intrinsic spin Hall effect in Pt against a change in the lattice constant. We measure spin-Torque ferromagnetic resonance for Pt/Ni81Fe19 bilayers, where the lattice constant and carrier scattering time of the Pt layer are varied by incorporating the nitrogen atoms as interstitial impurities. We find that the spin Hall angle is enhanced by a factor of 3 as the resistivity of the Pt layer is increased by the nitrogen incorporation. The variation of the spin Hall conductivity is consistent with the prediction of the crossover of the intrinsic spin Hall effect from the moderately dirty regime to the dirty-metal regime. This result demonstrates the variation of the intrinsic spin Hall conductivity in Pt is dominated by the change in the scattering time, rather than the change in the band structure, under a few percent change in the lattice constant.

本文言語English
論文番号174427
ジャーナルPhysical Review B
103
17
DOI
出版ステータスPublished - 2021 5 24

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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