Magnetic recording simulation considering mean field interaction

The mean field theory was introduced into the particle assembly magnetization model to treat interparticle magnetic interaction. As a result, the remanence curves and Henkel plots were well simulated for longitudinally oriented Ba-ferrite media which exhibit large positive interaction. In perpendicularly anisotropic media, the slope of sheared M-H loops is changed by the mean field interaction. It is confirmed that the ring head recording performance for a perpendicularly anisotropic medium is strongly influenced by the particle interaction in a medium, and the reproduced voltage increases as the mean field interaction becomes stronger. On perpendicular magnetic recording using a SPT head and a double layer medium, it is also expected that the mean field interaction makes the recording characteristics better. The mean field interaction may affect the overwrite and the peak-shift characteristics as well as the recording density characteristics.>