Multiscale modeling of ultrafast element-specific magnetization dynamics of ferromagnetic alloys
Multiscale modeling of ultrafast element-specific magnetization dynamics of ferromagnetic alloys
A hierarchical multiscale approach to model the magnetization dynamics of ferromagnetic ran- dom alloys is presented. First-principles calculations of the Heisenberg exchange integrals are linked to atomistic spin models based upon the stochastic Landau-Lifshitz-Gilbert (LLG) equation to calculate temperature-dependent parameters (e.g., effective exchange interactions, damping param- eters). These parameters are …