Einstein-de Haas phase shifts in surface acoustic waves

Shoma Tateno, Yuki Kurimune, Mamoru Matsuo, Kazuto Yamanoi, Yukio Nozaki

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We demonstrate the phase shift of the Rayleigh-type surface acoustic wave (RSAW) in a ferromagnetic Ni81Fe19 film based on the gyromagnetic Einstein-de Haas (EdH) torque that can be attributed to the back action of spin-wave excitation. The EdH torque modulates the transverse velocity of the bulk acoustic wave that causes the bipolar phase shift of RSAW. When compared with a magnetoelastic torque, the phase shift can be more prominently enhanced by increasing the frequency. The gyromagnetic torque in the RSAW paves the way for controlling spin-mechatronics devices without magnetoelastic torque which is specific to a certain material.

Original languageEnglish
Article numberL020404
JournalPhysical Review B
Volume104
Issue number2
DOIs
Publication statusPublished - 2021 Jul 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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