Time-resolved spectroscopy of spin-current emission from a magnetic insulator

Yuma Tateno, Masaya Fukami, Takaharu Tashiro, and Kazuya Ando
Phys. Rev. B 93, 174423 – Published 23 May 2016

Abstract

We demonstrate time-resolved spectroscopy of spin-current emission from a magnetic insulator using the inverse spin Hall effect (ISHE). We measured magnetic field dependence of the spin-current emission in the time domain and found that the spectral shape of the ISHE voltage changes with time. The change in the spectral shape is due to field and power dependent temporal oscillation of the spin pumping driven by parametric magnons. The observed oscillating spin-current emission driven by dipole-exchange magnons is well reproduced by a model calculation based on the S theory. In contrast, the spin-current emission driven by short-wavelength exchange magnons cannot be reproduced with this model, illustrating an important role of higher-order nonlinear effects in the spin-current emission.

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  • Received 10 February 2016

DOI:https://doi.org/10.1103/PhysRevB.93.174423

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Yuma Tateno1, Masaya Fukami1, Takaharu Tashiro1, and Kazuya Ando1,2,*

  • 1Department of Applied Physics and Physico-Informatics, Keio University, Yokohama 223-8522, Japan
  • 2PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan

  • *ando@appi.keio.ac.jp

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Issue

Vol. 93, Iss. 17 — 1 May 2016

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