Analysis of Writing Characteristics of CF-SPT Head Using 3-D Read/Write Simulation System

Abstract

Abstract-Recently, the increase of areal recording density is remarkable. In order to develop a high density recording device, a read/write (R/W) simulation using three dimensional (3-D) magnetic field analysis is indispensable. In this paper, the magnetic field in a cusp-field single-pole-type (CF-SPT) head with discrete track media is analyzed using a 3-D R/W simulation system, in which edge-based finite element method and 3-D medium hysteresis model based on the ensemble of the Stoner-Wohlfarth (SW) particles are combined. The effects of ampereturns and the discrete track media on the distribution of recorded magnetization are investigated. The detailed behavior of flux around the discrete track media and continuous media is illustrated.Index Terms-Cusp-field single-pole-type (CF-SPT) head, discrete track media, magnetic recording, medium hysteresis model, three-dimensional finite element method.

3-D FEM analysis of writing characteristics of CF-SPT head in cross-track and down-track directions

“…The distribution of magnetization in continuous media is almost the same with that in the discrete track media as denoted in Ref. [4]. Although there exists some leakage flux in the adjacent track of discrete track media and continuous media, the cross-track interference is negligible, because the amplitude of leakage flux is not sufficiently large to magnetize the media.…”

3-D FEM analysis of the effects of SPT head dimensions on recording in discrete and continuous media

“…In this paper, the effect of the width of the write head on the behavior of the flux and magnetization was investigated using three-dimensional (3-D) read/write simulation system [2], [3] for continuous track medium and discrete track medium. The effect of the width of the read head on the output is also examined.…”