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The classical two-sublattice Landau-Lifshitz-Bloch equation for all temperatures

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2015

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Nieves, Pablo
Chantrell, Roy W.
Chubikalo-Fresenko, Oksana

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https://doi.org/10.1063/1.4930973
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Journal of Low Temperature Physics. 2015, 41(9), pp. 739-744. ISSN 0022-2291. eISSN 1573-7357. Available under: doi: 10.1063/1.4930973

Zusammenfassung

Micromagnetic modeling has proved itself as a widely used tool, complimentary in many respects to experimental measurements. The Landau-Lifshitz equation provides a basis for this modeling, especially where the dynamical behaviour is concerned. However, this approach is strictly valid only for zero temperature and for high temperatures must be replaced by a more thermodynamically consistent approach such as the Landau-Lifshitz-Bloch (LLB) equation. Here we review the recently derived LLB equation for two-sublattice systems and extend its derivation for temperatures above the Curie temperature. We present comparison with many-body atomistic simulations and show that this equation can describe the ultra-fast switching in ferrimagnets, observed experimentally.

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530 Physik

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Curie point, Magnetization dynamics, Ferrimagnetism, Langevin equation, Ferromagnetism

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ISO 690NIEVES, Pablo, Unai ATXITIA, Roy W. CHANTRELL, Oksana CHUBIKALO-FRESENKO, 2015. The classical two-sublattice Landau-Lifshitz-Bloch equation for all temperatures. In: Journal of Low Temperature Physics. 2015, 41(9), pp. 739-744. ISSN 0022-2291. eISSN 1573-7357. Available under: doi: 10.1063/1.4930973
BibTex
@article{Nieves2015class-32370,
  year={2015},
  doi={10.1063/1.4930973},
  title={The classical two-sublattice Landau-Lifshitz-Bloch equation for all temperatures},
  number={9},
  volume={41},
  issn={0022-2291},
  journal={Journal of Low Temperature Physics},
  pages={739--744},
  author={Nieves, Pablo and Atxitia, Unai and Chantrell, Roy W. and Chubikalo-Fresenko, Oksana}
}
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