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

P. Nieves, U. Atxitia, R. W. Chantrell, O. Chubykalo–Fesenko
2015 Low temperature physics (Woodbury, N.Y., Print)  
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
more » ... ntly 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. PACS: 75.10.Hk Classical spin models; 75. Magnetic properties and materials; 75.78.-n Magnetization dynamics.
doi:10.1063/1.4930973 fatcat:7p3xiwtr2bazbaf3oaksbekwpy