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Keshtgar, H. (author), Streib, S.D. (author), Kamra, Akashdeep (author), Blanter, Y.M. (author), Bauer, G.E. (author)
We address the theory of the coupled lattice and magnetization dynamics of freely suspended single-domain nanoparticles. Magnetic anisotropy generates low-frequency satellite peaks in the microwave absorption spectrum and a blueshift of the ferromagnetic resonance (FMR) frequency. The low-frequency resonances are very sharp with maxima...
journal article 2017
document
Rückriegel, Andreas (author), Streib, S.D. (author), Bauer, G.E. (author), Duine, Rembert A. (author)
We develop a microscopic theory of spin-lattice interactions in magnetic insulators, separating rigid-body rotations and the internal angular momentum, or spin, of the phonons, while conserving the total angular momentum. In the low-energy limit, the microscopic couplings are mapped onto experimentally accessible magnetoelastic constants. We...
journal article 2020
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Streib, S.D. (author), Keshtgar, Hedyeh (author), Bauer, G.E. (author)
We theoretically investigate pumping of phonons by the dynamics of a magnetic film into a nonmagnetic contact. The enhanced damping due to the loss of energy and angular momentum shows interference patterns as a function of the resonance frequency and magnetic film thickness that cannot be described by viscous ("Gilbert") damping. The phonon...
journal article 2018
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Streib, S.D. (author), Vidal-Silva, Nicolas (author), Shen, Ka (author), Bauer, G.E. (author)
We address the theory of magnon-phonon interactions and compute the corresponding quasiparticle and transport lifetimes in magnetic insulators, with a 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...
journal article 2019
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