Replica behavior in direct overwritable exchange-coupled magneto-optical multilayer system

Abstract

The process of direct overwriting by light intensity modulation has been simulated for an exchange-coupled multilayer film without an initializing magnetization. Using the mean-field theory, the temperature dependence of the interlayer wall energy has been calculated for a magnetic triple layer, and the effect of interlayer exchange coupling on magnetization reversals has been investigated. The simulation has shown that replica can be easily realized by the arrangement of the Curie and compensation temperatures of the magnetic layers. A new mechanism of achieving replication from the initializing to the writing layers in the writing process is described in terms of subnetwork moments with high laser power.