Achieving high linear density is indispensable for high density in perpendicular magnetic recording. Therefore, a narrow reproducing pulse is important. The degradation of the resolution of a narrow track GMR head is a concern due to the resolution degradation in track edge. The sensitivity function and output of a shielded GMR head with different read track widths were investigated by using a commercial software JMAG-Studio which was based on 3 dimensional finite element method. The results were compared with calculation by using the two-dimensional finite element method and analytical expression. Although the sensitivity, function in the track center became narrower when the read track width was narrower, almost no changes in the all track output by reciprocity occurred, for either perpendicular or longitudinal reproduction. Based on this calculation, our work showed that read track width had almost no influence on the reading resolution of a shielded GMR head.
|ジャーナル||Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers|
|出版ステータス||Published - 2004 7月|
ASJC Scopus subject areas
- コンピュータ サイエンスの応用