Magnon-phonon interactions in magnetic insulators

Abstract

We address the theory of magnon-phonon interactions and compute the corresponding quasi-particle and transport lifetimes in magnetic insulators with focus on yttrium iron garnet at intermediate temperatures from anisotropy- and exchange-mediated magnon-phonon interactions, the latter being derived from the volume dependence of the Curie temperature. We find in general weak effects of phonon scattering on magnon transport and the Gilbert damping of the macrospin Kittel mode. The magnon transport lifetime differs from the quasi-particle lifetime at shorter wavelengths.

15 pages, 16 figures

References in corpus (10)

• Spin Seebeck insulator
• Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
• Theory of magnon-driven spin Seebeck effect
• Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect
• Magnon Polarons in the Spin Seebeck Effect
• Single particle relaxation time versus transport scattering time in a 2D graphene layer
• Thermal spin dynamics of yttrium iron garnet
• First-Principles Study of Exchange Interactions of Yttrium Iron Garnet
• Dynamic phase diagram of dc-pumped magnon condensates
• Magnon-phonon relaxation in yttrium iron garnet from first principles

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• Local Temperatures Out of Equilibrium
• Sum-frequency excitation of coherent magnons
• Confined magnetoelastic waves in thin waveguides
• Magnon polarons in the spin Peltier effect
• Magnonic Analogue of Edelstein Effect in Antiferromagnetic Insulators
• Magnon Polarons induced by a magnetic field gradient
• Composition-tunable magnon-polaron anomalies in spin Seebeck effects in epitaxial Bi${}_x$Y${}_{3-x}$Fe${}_5$O${}_{12}$ films
• Theory of the low-temperature longitudinal spin Seebeck effect
• Quantum entanglement generation on magnons assisted with microwave cavities coupled to a superconducting qubit
• Fractalized magnon transport on the quasicrystal with enhanced stability
• Magnon spin transport around the compensation magnetic field in easy-plane antiferromagnetic insulators
• Calculating spin-lattice interactions in ferro- and antiferromagnets: the role of symmetry, dimension and frustration
• Interband magnon drag in ferrimagnetic insulators
• Accumulation of magnetoelastic bosons in yttrium iron garnet: kinetic theory and wave vector resolved Brillouin light scattering
• An Effective Field Theory of Magneto-Elasticity