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

Автор(и)

  • P. Nieves Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, Madrid 28049, Spain
  • U. Atxitia Fachbereich Physik and Zukunftskolleg, Universität, Konstanz D-78457, Germany
  • R.W. Chantrell Department of Physics, University of York, York YO105DD, U.K.
  • O. Chubykalo-Fesenko Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, Madrid 28049, Spain

DOI:

https://doi.org/10.1063/1.4930973%20

Ключові слова:

Landau–Lifshitz–Bloch equation, micromagnetic modeling, ferromagnets.

Анотація

Micromagnetic modeling has proved itself as a widely used tool, complimentary in many respects to experi-mental 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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Опубліковано

2015-07-21

Як цитувати

(1)
Nieves, P.; Atxitia, U.; Chantrell, R.; Chubykalo-Fesenko, O. The Classical Two-Sublattice Landau–Lifshitz–Bloch Equation for All Temperatures. Fiz. Nizk. Temp. 2015, 41, 949-955.

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