Simulations for recording processes of crescent-shape domain in MO Media

Abstract

A new method is developed to simulate how crescent-shape domains are stabilized in magneto optical recording. Based on the method in which dynamics of a domain wall is estimated from the calculation of force on the wall, the wall is assumed as the zero thickness line in arbitrary shapes. With this method the deformation processes of arbitrary domain shapes especially crescent ones were performed under the several conditions. The results show that the rapid quenching of the film temperature plays an important role to write crescent-shape domains and over 50Gb/in² can be recorded.