Interparticle Interaction Field in Magnetic Recording Media.

Henkel plots arelinearized when the field −αM compensating for the interparticle meaninteraction field is applied during VSM measurements. By this method, the mean field constants α were estimated to be about 0 and 0.2 for longitudinally oriented Baferrite particulate media with squarenesses of 0.5 and 0.8, respectively. To consider the interparticle magnetic interaction in the recording simulation, the mean field was introduced into our simulator based on a finite element method and the curling magnetization switching model. By simulation analysis, it was shown that the reproducing voltage atlow recording densities was increased by the positive mean field in a longitudinally oriented Ba-ferrite medium. On the other hand, in a perpendicularly oriented medium, the high-density performance was greatly improved by the mean field.