Modulation of effective damping constant using spin Hall effect

Shinya Kasai, Kouta Kondou, Hiroaki Sukegawa, Seiji Mitani, Kazuhito Tsukagoshi, Yoshichika Otani

研究成果: Article査読

30 被引用数 (Scopus)

抄録

We have investigated modulation of the effective damping constant αeff via spin currents through the spin Hall effect for Permalloy/Pt bilayer films with various thicknesses. The observed linear and sinusoidal dependences of current density and field direction on αeff are in agreement with the analytical model. By comparing the thickness dependence of spin Hall angle obtained from the damping modulation with that previously obtained by spin-torque-induced ferromagnetic resonance, we show that there is no clear extrinsic contribution in the present method. We also show the large modulation of the effective damping constant (down to ∼20%) in the high-current-density region.

本文言語English
論文番号092408
ジャーナルApplied Physics Letters
104
9
DOI
出版ステータスPublished - 2014 3月 3
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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