Magnetic Printing Simulation of an AFC Medium with a Patterned Master Disk

抄録

Magnetic printing simulations of conventional and AFC media were performed by solving the Poisson equation for a two-dimensional model of patterned master films and a slave disk system. When the applied field for the printing is weak, the recorded magnetizations in the medium of the slave disk cannot be switched in the central region between patterned films, and the output waveforms for the recorded magnetizations are severely distorted, producing subpulses for both media. On the other hand, when the applied field is strong, though the recorded magnetizations can be switched completely, the output waveforms are also distorted, with the peaks shifted to the center of the soft magnetic patterned films. As a result, there exist optimum applied fields dependent on the patterned film thickness and the patterned interval of themaster disk. Furthermore, it is shown that the recorded magnetizations in the AFC medium just after printing are parallel between two recording layers and become antiparallel about 100 sec. after printing.