New Simulation Model for Perpendicular Recording Co-Cr Medium

Numerical analysis of a Co-Cr medium-ring type head system for perpendicular recording are performed using a two dimensional model with a finite element method. A new magnetization model of the Co-Cr medium is proposed, a columnar structure being taken into consideration. The medium is divided into elements for the calculation and an additional field, Had∝( Mupper+ Mlower) is assumed to be applied from upper and lower elements within a column, where M is the magnetization of the element. The results of the simulation show that the interaction between elements plays an important role in the magnetization process of the Co-Cr medium.