@article{Kamra2018-08-13T18:10:48ZGilbe-43115.2,
  year={2018},
  doi={10.1103/PhysRevB.98.184402},
  title={Gilbert damping phenomenology for two-sublattice magnets},
  number={18},
  volume={98},
  issn={2469-9950},
  journal={Physical Review B},
  author={Kamra, Akashdeep and Troncoso, Roberto E. and Belzig, Wolfgang and Brataas, Arne},
  note={Article Number: 184402}
}

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    <dcterms:abstract xml:lang="eng">We present a systematic phenomenological description of Gilbert damping in two-sublattice magnets. Our theory covers the full range of materials from ferro- via ferri- to antiferromagnets. Following a Rayleigh dissipation functional approach within a Lagrangian classical field formulation, the theory captures intra- as well as cross-sublattice terms in the Gilbert damping, parameterized by a 2$\times$2 matrix. When spin-pumping into an adjacent conductor causes dissipation, we obtain the corresponding Gilbert damping matrix in terms of the interfacial spin-mixing conductances. Our model reproduces the experimentally observed enhancement of the ferromagnetic resonance linewidth in a ferrimagnet close to its compensation temperature without requiring an increased Gilbert parameter. It also predicts new contributions to damping in an antiferromagnet and suggests the resonance linewidths as a direct probe of the sublattice asymmetry, which may stem from boundary or bulk.</dcterms:abstract>
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    <dc:contributor>Troncoso, Roberto E.</dc:contributor>
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    <dcterms:title>Gilbert damping phenomenology for two-sublattice magnets</dcterms:title>
    <dc:contributor>Brataas, Arne</dc:contributor>
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