Temperature-dependent magnetic damping of yttrium iron garnet spheres

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2017
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Maier-Flaig, Hannes
Dubs, Carsten
Surzhenko, Oleksii
Gross, Rudolf
Weiler, Matthias
Huebl, Hans
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Physical Review B ; 95 (2017), 21. - 214423. - American Physical Society (APS). - ISSN 0163-1829. - eISSN 1095-3795
Abstract
We investigate the temperature-dependent microwave absorption spectrum of an yttrium iron garnet sphere as a function of temperature (5 to 300K) and frequency (3 to 43.5GHz). At temperatures above 100K, the magnetic resonance linewidth increases linearly with temperature and shows a Gilbert-like linear frequency dependence. At lower temperatures, the temperature dependence of the resonance linewidth at constant external magnetic fields exhibits a characteristic peak which coincides with a non-Gilbert-like frequency dependence. The complete temperature and frequency evolution of the linewidth can be modeled by the phenomenology of slowly relaxing rare-earth impurities and either the Kasuya-LeCraw mechanism or the scattering with optical magnons. Furthermore, we extract the temperature dependence of the saturation magnetization, the magnetic anisotropy, and the g factor.
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530 Physics
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ISO 690MAIER-FLAIG, Hannes, Stefan KLINGLER, Carsten DUBS, Oleksii SURZHENKO, Rudolf GROSS, Matthias WEILER, Hans HUEBL, Sebastian T. B. GÖNNENWEIN, 2017. Temperature-dependent magnetic damping of yttrium iron garnet spheres. In: Physical Review B. American Physical Society (APS). 95(21), 214423. ISSN 0163-1829. eISSN 1095-3795. Available under: doi: 10.1103/PhysRevB.95.214423
BibTex
@article{MaierFlaig2017-03-28T08:18:34ZTempe-51785,
  year={2017},
  doi={10.1103/PhysRevB.95.214423},
  title={Temperature-dependent magnetic damping of yttrium iron garnet spheres},
  number={21},
  volume={95},
  issn={0163-1829},
  journal={Physical Review B},
  author={Maier-Flaig, Hannes and Klingler, Stefan and Dubs, Carsten and Surzhenko, Oleksii and Gross, Rudolf and Weiler, Matthias and Huebl, Hans and Gönnenwein, Sebastian T. B.},
  note={Article Number: 214423}
}
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