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

D. Kobayashi, T. Yoshikawa, M. Matsuo, R. Iguchi, S. Maekawa, E. Saitoh, and Y. Nozaki
Phys. Rev. Lett. 119, 077202 – Published 16 August 2017
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Abstract

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 SiO2 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.

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  • Received 20 May 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.077202

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

D. Kobayashi1, T. Yoshikawa1, M. Matsuo2,3, R. Iguchi4,5, S. Maekawa2, E. Saitoh2,3,5,6, and Y. Nozaki1,7,*

  • 1Department of Physics, Keio University, Yokohama 223-8522, Japan
  • 2Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
  • 3Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 4National Institute for Materials Science, Tsukuba 305-0047, Japan
  • 5Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 6Center for Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan
  • 7Center for Spintronics Research Network, Keio University, Yokohama 223-8522, Japan

  • *nozaki@phys.keio.ac.jp

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Issue

Vol. 119, Iss. 7 — 18 August 2017

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