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Magnon polarons in the spin Peltier effect

Yahiro, Reimei*; Kikkawa, Takashi*; Ramos, R.*; Oyanagi, Koichi*; Hioki, Tomosato*; Daimon, Shunsuke*; Saito, Eiji

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 magnonpolaron 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.



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Category:Materials Science, Multidisciplinary



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