Growth, strain, and spin-orbit torques in epitaxial Ni-Mn-Sb films sputtered on GaAs

N. Zhao, A. Sud, H. Sukegawa, S. Komori, K. Rogdakis, K. Yamanoi, J. Patchett, J. W.A. Robinson, C. Ciccarelli, H. Kurebayashi

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We report current-induced spin torques in epitaxial NiMnSb films on a commercially available epiready GaAs substrate. The NiMnSb was grown by cosputtering from three targets using optimized parameters. The films were processed into microscale bars to perform current-induced spin-torque measurements. Magnetic dynamics were excited by microwave currents, and electric voltages along the bars were measured to analyze the symmetry of the current-induced torques. We found that the extracted symmetry of the spin torques matches those expected from spin-orbit interaction in a tetragonally distorted half-Heusler crystal. Both fieldlike and dampinglike torques are observed in all the samples characterized, and the efficiency of the current-induced torques is comparable to that of ferromagnetic metal/heavy-metal bilayers.

本文言語English
論文番号014413
ジャーナルPhysical Review Materials
5
1
DOI
出版ステータスPublished - 2021 1
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 物理学および天文学(その他)

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