Spin Current Generation Using a Surface Acoustic Wave Generated via Spin-Rotation Coupling

We demonstrate the generation of alternating spin current (SC) via spin-rotation coupling (SRC) using a surface acoustic wave (SAW) in a Cu film. Ferromagnetic resonance caused by injecting SAWs was observed in a Ni-Fe film attached to a Cu film, with the resonance further found to be suppressed thr...

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Bibliographic Details
Published in:Physical review letters 2017-08, Vol.119 (7), p.077202-077202, Article 077202
Main Authors: Kobayashi, D, Yoshikawa, T, Matsuo, M, Iguchi, R, Maekawa, S, Saitoh, E, Nozaki, Y
Format: Article
Language:English
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Summary:We demonstrate the generation of alternating spin current (SC) via spin-rotation coupling (SRC) using a surface acoustic wave (SAW) in a Cu film. Ferromagnetic resonance caused by injecting SAWs was observed in a Ni-Fe film attached to a Cu film, with the resonance further found to be suppressed through the insertion of a SiO_{2} film into the interface. The intensity of the resonance depended on the angle between the wave vector of the SAW and the magnetization of the Ni-Fe film. This angular dependence is explicable in terms of the presence of spin transfer torque from a SC generated via SRC.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.119.077202