Performance of Discrete Track Perpendicular Media on Off-Track-Capability at Higher Track Density

The HDD demands higher areal density for large capacity. However, in higher track density, the cross-talk issue at reading process and the side-write issue at writing process become critical. Discrete track medium, which has phiysically separated tracks and grooves, is expected as the most promising technology for improving these problems [1], [2], [3]. Track mis-registration of a magnetic head is generated during the read and write process. Therefore off-track-capability (OTC) is very important for achieving a HDD with higher track density. In this paper, the OTC of a discrete track medium and a conventional medium, which has continuous recording layer, are compared by using Landau-Lifshits-Gilbert micromagnetic simulation [4].