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.

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

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Cited by in corpus (13)

• Roadmap on Spin-Wave Computing
• Advances in coherent coupling between magnons and acoustic phonons
• Spin and spin current -- From fundamentals to recent progress
• Observation of magnon-polarons in a uniaxial antiferromagnetic insulator
• Spin Seebeck Effect: Sensitive Probe for Elementary Excitation, Spin Correlation, Transport, Magnetic Order, and Domains in Solids
• Giant spin Nernst effect in a two-dimensional antiferromagnet due to magnetoelastic coupling-induced gaps and interband transitions between magnon-like bands
• Double accumulation and anisotropic transport of magneto-elastic bosons in yttrium iron garnet films
• Composition-tunable magnon-polaron anomalies in spin Seebeck effects in epitaxial Bi${}_x$Y${}_{3-x}$Fe${}_5$O${}_{12}$ films
• Facet-dependent magnon-polarons in epitaxial ferrimagnetic Fe3O4 thin films
• Magnon Polarons induced by a magnetic field gradient
• Thermal effects in spintronic materials and devices: an experimentalist's guide
• Temperature dependence of the magnon-phonon interaction in high overtone bulk acoustic resonator-ferromagnetic thin film hybrids
• Cryogenic spin Peltier effect detected by a RuO${}_2$-AlO${}_x$ on-chip microthermometer