Magnon polarons in the spin Peltier effect

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.

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

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Cited by in corpus (1)

• Magnon Polarons induced by a magnetic field gradient