Inverse spin-hall effect induced by spin pumping in various metals

Kazuya Ando, Yosuke Kajiwara, Kohei Sasage, Kenichi Uchida, Eiji Saitoh

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13 Citations (Scopus)

Abstract

The inverse spin-Hall effect (ISHE), conversion of spin currents into electric voltage, was observed in ${\rm Ni}-{81}{\rm Fe}-{19}/N$ ($N={\rm Pt}$, Pd, Ag, and Au) films using the spin pumping at room temperature. The spin pumping driven by magnetization precession in the ${\rm Ni}-{81}{\rm Fe}-{19}$ layer injects a spin current into the $N$ layer, giving rise to an electric potential difference between the edges of the $N$ layer via ISHE. We found resonant electromotive force signals at the ferromagnetic resonance condition in the ${\rm Ni}-{81}{\rm Fe}-{19}/N$ films. The spectral shape of the electromotive force signals are well reproduced by simple Lorentz functions, which is consistent with the prediction of ISHE induced by the spin pumping. The ISHE signal was observed to typically be enhanced in the ${\rm Ni}-{81}{\rm Fe}-{19}/{\rm Pt}$ system, showing the crucial role of the spin-orbit interaction in ISHE induced by the spin pumping.

Original languageEnglish
Article number5552230
Pages (from-to)3694-3696
Number of pages3
JournalIEEE Transactions on Magnetics
Volume46
Issue number9
DOIs
Publication statusPublished - 2010 Sep

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Keywords

  • Ferromagnetic resonance
  • Spin currents
  • Spin pumping
  • Spin-Hall effect

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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