Abstract
The characteristics of magnetic contact duplication for perpendicular magnetic recording media are investigated by using the three-dimensional finite element method. In order to magnetically duplicate a servo signal on perpendicular recording media, there are two methods of applying a duplication magnetic field. One is method to apply a magnetic field in a direction perpendicular to the disk plane (perpendicular field application, PFA), and the other is to apply a field in the disk plane (in-plane field application, IFA). In PFA, the dependence of the duplication performance on the field strength has an optimum value which is around the coercivity of the slave medium. In IFA, the duplication performance is improved by increasing the duplication field up to a certain field strength beyond which the strength the performance is saturated. Duplication characteristics of the slave media change a little even though the track width decreases in the case of PFA, while it decreases with decreasing track width in the case of IFA. The results of simulation show that IFA is more advantageous than PFA for duplication of perpendicular magnetic recording media.
