Magnon polarons in the spin seebeck effect

Takashi Kikkawa, Ka Shen, Benedetta Flebus, Rembert A. Duine, Ken Ichi Uchida, Zhiyong Qiu, Gerrit E.W. Bauer, Eiji 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
Number of pages6
JournalPhysical Review Letters
Volume117
Issue number20
DOIs
Publication statusPublished - 10 Nov 2016

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    Kikkawa, T., Shen, K., Flebus, B., Duine, R. A., Uchida, K. I., Qiu, Z., Bauer, G. E. W., & Saitoh, E. (2016). Magnon polarons in the spin seebeck effect. Physical Review Letters, 117(20), [207203]. https://doi.org/10.1103/PhysRevLett.117.207203