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

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

Nieves, P. ; Atxitia, U. ; Chantrell, R.W. ; Chubykalo-Fesenko, O.

Тема: К 80-летию уравнения Ландау–Лифшица

Інший ID: PACS: 75.10.Hk, 75., 75.78.–n

URI: http://dspace.nbuv.gov.ua/handle/123456789/128077

Посилання: The classical two-sublattice Landau–Lifshitz–Bloch equation for all temperatures / P. Nieves, U. Atxitia, R.W. Chantrell, O. Chubykalo-Fesenko // Физика низких температур. — 2015. — Т. 41, № 9. — С. 949–955. — Бібліогр.: 39 назв. — англ.

Підтримка: This work was supported by the EU Seventh Framework Programme FP7/2007-2013 under grant agreement No. 281043, FEMTOSPIN. P.N. and O.C-F also acknowledge support from the Spanish Ministry of Economy and Competitiveness under the grant MAT2013-47078-C2-2-P. U.A. acknowledges support from the European Community’s Seventh Framework Programme (FP7/2007-2013) under the Curie Zukunftskolleg Incoming Fellowship Programme (Grant No. 291784), University of Konstanz.

Дата: 2015

Завантажень: 540

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

Анотація:

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 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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