Magnon Polarons in the Spin Seebeck Effect

Takashi Kikkawa; Ka Shen; Benedetta Flebus; Rembert A. Duine; Ken-ichi Uchida; Zhiyong Qiu; Gerrit E. W. Bauer; Eiji Saitoh

doi:10.1103/PhysRevLett.117.207203

Magnon Polarons in the Spin Seebeck Effect

Materials Science 2016-11-11 v2

Authors: Takashi Kikkawa , Ka Shen , Benedetta Flebus , Rembert A. Duine , Ken-ichi Uchida , Zhiyong Qiu , Gerrit E. W. Bauer , Eiji Saitoh

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Abstract

Sharp structures in magnetic field-dependent spin Seebeck effect (SSE) voltages of Pt/Y $_{3}$ Fe $_{5}$ O $_{12}$ (YIG) at low temperatures are attributed to the magnon-phonon interaction. Experimental results are well reproduced by a Boltzmann theory that includes the magnetoelastic coupling (MEC). The SSE anomalies coincide with magnetic fields tuned to the threshold of magnon-polaron formation. The effect gives insight into the relative quality of the lattice and magnetization dynamics.

Keywords

spin Seebeck effect magnon polarons magnon-phonon interaction magnetoelastic coupling YIG Boltzmann theory

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@article{arxiv.1607.02312,
  title  = {Magnon Polarons in the Spin Seebeck Effect},
  author = {Takashi Kikkawa and Ka Shen and Benedetta Flebus and Rembert A. Duine and Ken-ichi Uchida and Zhiyong Qiu and Gerrit E. W. Bauer and Eiji Saitoh},
  journal= {arXiv preprint arXiv:1607.02312},
  year   = {2016}
}

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6 pages, 4 figures, 1 table

Magnon Polarons in the Spin Seebeck Effect

Abstract

Keywords

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