Magnon polarons in the spin Peltier effect

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

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


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 Lu2Bi1Fe4Ga1O12 (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.

Original languageEnglish
Article number024407
JournalPhysical Review B
Issue number2
Publication statusPublished - 2020 Jan 13

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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