Ferromagnetic resonance in an ensemble of nanoparticles with randomly distributed anisotropy axes

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2008
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Sukhov, Alexander
Usadel, Klaus-Dieter
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Journal of Magnetism and Magnetic Materials. 2008, 320(1-2), pp. 31-35. Available under: doi: 10.1016/j.jmmm.2007.05.001
Zusammenfassung

Spectra of absorbed power as probed by ferromagnetic resonance (FMR) are numerically calculated within a macro-spin model for single domain nanoparticles using Landau-Lifshitz-Gilbert dynamics. Randomly distributed anisotropy axis and a distribution of anisotropy energies result in a significant broadening of the FMR signal as compared to an ensemble of particles all having the same anisotropy. Additionally, a temperature dependence of the shift of the resonance frequency is obtained which is in a qualitative agreement with experimental data on single domain nanoparticles.

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530 Physik
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magnetic nanoparticles, ferromagnetic resonance, anisotropy
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ISO 690SUKHOV, Alexander, Klaus-Dieter USADEL, Ulrich NOWAK, 2008. Ferromagnetic resonance in an ensemble of nanoparticles with randomly distributed anisotropy axes. In: Journal of Magnetism and Magnetic Materials. 2008, 320(1-2), pp. 31-35. Available under: doi: 10.1016/j.jmmm.2007.05.001
BibTex
@article{Sukhov2008Ferro-1009,
  year={2008},
  doi={10.1016/j.jmmm.2007.05.001},
  title={Ferromagnetic resonance in an ensemble of nanoparticles with randomly distributed anisotropy axes},
  number={1-2},
  volume={320},
  journal={Journal of Magnetism and Magnetic Materials},
  pages={31--35},
  author={Sukhov, Alexander and Usadel, Klaus-Dieter and Nowak, Ulrich}
}
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