Magnon Polarons in the Spin Seebeck Effect

27 Oct 2016 · Kikkawa Takashi, Shen Ka, Flebus Benedetta, Duine Rembert A., Uchida Ken-ichi, Qiu Zhiyong, Bauer Gerrit E. W., Saitoh Eiji ·

Sharp structures in magnetic field-dependent spin Seebeck effect (SSE) voltages of Pt/Y$_{3}$Fe$_{5}$O$_{12}$ (YIG) at low temperatures are attributed to the magnon-phonon interaction. Experimental results are well reproduced by a Boltzmann theory that includes the magnetoelastic coupling (MEC). 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.

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Magnon Polarons in the Spin Seebeck Effect

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