Magnon polarons in the spin Peltier effect

Reimei Yahiro; Takashi Kikkawa; Rafael Ramos; Koichi Oyanagi; Tomosato Hioki; Shunsuke Daimon; Eiji Saitoh

doi:10.1103/PhysRevB.101.024407

Magnon polarons in the spin Peltier effect

Materials Science 2020-01-15 v1

Authors: Reimei Yahiro , Takashi Kikkawa , Rafael Ramos , Koichi Oyanagi , Tomosato Hioki , Shunsuke Daimon , Eiji Saitoh

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Abstract

We report the observation of anomalous peak structures induced by hybridized magnon-phonon excitation (magnon polarons) in the magnetic field dependence of the spin Peltier effect (SPE) in a Lu $_{2}$ Bi $_{1}$ Fe $_{4}$ Ga $_{1}$ O $_{12}$ (BiGa:LuIG) with Pt contact. The SPE peaks coincide with magnetic fields tuned to the threshold of magnon-polaron formation, consistent with the previous observation in the spin Seebeck effect. The enhancement of SPE is attributed to the lifetime increase in spin current caused by magnon-phonon hybridization in BiGa:LuIG.

Keywords

magnon polarons spin Peltier effect magnon-phonon hybridization spin current BiGa:LuIG magnetic field dependence

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@article{arxiv.1912.11573,
  title  = {Magnon polarons in the spin Peltier effect},
  author = {Reimei Yahiro and Takashi Kikkawa and Rafael Ramos and Koichi Oyanagi and Tomosato Hioki and Shunsuke Daimon and Eiji Saitoh},
  journal= {arXiv preprint arXiv:1912.11573},
  year   = {2020}
}

Comments

Phys. Rev. B (in press), 7 pages, 5 figures

Magnon polarons in the spin Peltier effect

Abstract

Keywords

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