Mesoscale simulations of atomic ordering in nano-layered FePt

The present paper deals with structural transformations in nano-layered FePt considered as a material for ultra-high density magnetic storage media. Within these studies the Mesoscale Monte Carlo model has been constructed in order to investigate kinetics of antiphase interfaces motion. The motion of the interfaces is realized by local FePt domains reorientation due to energy minimalization. The data of energy barriers for all the transformation types were taken from previously performed atomistic simulations. The results show that the thin layer of energetically preferred domains forms at the free surface. The thickness of such a layer is controlled by temperature. The results obtained here present also kinetics of FePt domains growth at free surface. It can be observed that the growth of the domains is driven by the curvature of interfaces related to domains size.