Magnetic properties of Exchange-spring DyFe_2/YFe_2 Superlattices by Monte Carlo Simulations

摘要

Monte Carlo simulations are used to perform an atomic scale modelling of the magnetic properties of epitaxial exchange-coupled DyFe_2/YFe_2 superlattices. These samples, extremely well-researched experimentally, are constituted by a hard ferrimagnet DyFe_2 and a soft ferrimagnet YFe_2 antiferromagnetically coupled. Depending on the layers and on the temperature, the field dependence of the magnetization depth profile is complex. In this work, we reproduce by Monte Carlo simulations hysteresis loops for the net and compound-specific magnetizations at different temperatures, and assess the quality of the results by a direct comparison to experimental hysteresis loops.