The classical two-sublattice Landau-Lifshitz-Bloch equation for all temperatures
The classical two-sublattice Landau-Lifshitz-Bloch equation for all temperatures
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2015
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Journal of Low Temperature Physics ; 41 (2015), 9. - S. 739-744. - ISSN 0022-2291. - eISSN 1573-7357
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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NIEVES, 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. 41(9), pp. 739-744. ISSN 0022-2291. eISSN 1573-7357. Available under: doi: 10.1063/1.4930973BibTex
@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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