Magnon Polarons in the Spin Seebeck Effect

Abstract

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.

6 pages, 4 figures, 1 table

References in corpus (6)

• Direct electronic measurement of the spin Hall effect
• Theory of magnon-driven spin Seebeck effect
• Spin Pumping in Electrodynamically Coupled Magnon-Photon Systems
• Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet
• Spin convertance at magnetic interfaces
• Coherent elastic excitation of spin waves

Cited by in corpus (4)

• Direct observation of magnon-phonon coupling in yttrium iron garnet
• Nonlocal magnon-polaron transport in yttrium iron garnet
• Criteria for accurate determination of the magnon relaxation length from the nonlocal spin Seebeck effect
• Magnon-polaron excitations in the noncollinear antiferromagnet Mn${}_3$Ge