Magnon polarons in the spin seebeck effect

T. Kikkawa, K. Shen, B. Flebus, R.A. Duine, K.I. Uchida, Z. Qiu, G.E.W. Bauer, E. Saitoh

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Abstract

Sharp structures in the magnetic field-dependent spin Seebeck effect (SSE) voltages of Pt/Y3Fe5O12 at low temperatures are attributed to the magnon-phonon interaction. Experimental results are well reproduced by a Boltzmann theory that includes magnetoelastic coupling. The SSE anomalies coincide with magnetic fields tuned to the threshold of magnon-polaron formation. The effect gives insight into the relative quality of the lattice and magnetization dynamics.

Original languageEnglish
Article number207203
JournalPhysical Review Letters
Volume117
Issue number20
DOIs
Publication statusPublished - 10 Nov 2016

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