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Magnon-phonon interactions in magnetic insulators

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arxiv 1906.01042 v1 pith:F7EQNQH5 submitted 2019-06-03 cond-mat.str-el cond-mat.mes-hall

Magnon-phonon interactions in magnetic insulators

Simon Streib , Nicolas Vidal-Silva , Ka Shen , Gerrit E. W. Bauer This is my paper
classification cond-mat.str-el cond-mat.mes-hall
keywords interactionsmagnon-phonontransportinsulatorslifetimemagneticmagnonquasi-particle
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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