Multiscale modelling of hysteresis in FePt/FeRh bilayer

The switching field reduction of the FePt layer due to the coupling to FeRh layer has been investigated in systems of different geometries and different coupling strengths. The atomistic and multiscale (atomistic at the interface and micromagnetic far from it) models have been considered for an isolated grain and thin film geometries, respectively. It has been shown that a considerable reduction of the switching film in FePt could be achieved even for small interface exchange value. The decrease of the coercive field value in hard material has been investigated as a function of thickness of both hard and soft medium.