Modelling of the magnetization reversal of nanocomposites consisting of core-shell particles

We performed large-scale micromagnetic simulations on core-shell particle systems for SrFe12O19/Fe and CoFe2O4/Co nanocomposites, where both magnetically hard and soft materials were considered as the core or shell materials of these particles. A detailed analysis of the influence of structural properties and exchange core-shell coupling within the same particle on the magnetization reversal of a nanocomposite was carried out, revealing different remagnetization scenarios in terms of the evolution of magnetization distributions in soft magnetic cores. The optimal nanocomposite compounds with respect to the energy product of material were predicted.