Inverse spin-Hall effect induced by spin pumping in metallic system

K. Ando, S. Takahashi, J. Ieda, Y. Kajiwara, H. Nakayama, T. Yoshino, K. Harii, Y. Fujikawa, M. Matsuo, S. Maekawa, E. Saitoh

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Abstract

The inverse spin-Hall effect (ISHE) induced by the spin pumping has been investigated systematically in simple ferromagnetic/paramagnetic bilayer systems. The spin pumping driven by ferromagnetic resonance injects a spin current into the paramagnetic layer, which gives rise to an electromotive force transverse to the spin current using the ISHE in the paramagnetic layer. In a Ni81 Fe 19/ Pt film, we found an electromotive force perpendicular to the applied magnetic field at the ferromagnetic resonance condition. The spectral shape of the electromotive force is well reproduced using a simple Lorentz function, indicating that the electromotive force is due to the ISHE induced by the spin pumping; extrinsic magnetogalvanic effects are eliminated in this measurement. The electromotive force varies systematically by changing the microwave power, magnetic-field angle, and film size, being consistent with the prediction based on the Landau-Lifshitz-Gilbert equation combined with the models of the ISHE and spin pumping. The electromotive force was observed also in a Pt / Y 3 Fe 4 GaO 12 film, in which the metallic Ni 81 Fe 19 layer is replaced by an insulating Y 3 Fe 4 GaO 12 layer, supporting that the spin-pumping-induced ISHE is responsible for the observed electromotive force.

Original languageEnglish
Article number103913
JournalJournal of Applied Physics
Volume109
Issue number10
DOIs
Publication statusPublished - 2011 May 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Ando, K., Takahashi, S., Ieda, J., Kajiwara, Y., Nakayama, H., Yoshino, T., Harii, K., Fujikawa, Y., Matsuo, M., Maekawa, S., & Saitoh, E. (2011). Inverse spin-Hall effect induced by spin pumping in metallic system. Journal of Applied Physics, 109(10), [103913]. https://doi.org/10.1063/1.3587173