記録ヘッド磁界計算の現状と課題

概要

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Numerical analysis is an indispensable tool for analyzing the recording phenomena in a very small region and in a very short period. In order to realize higher-density and higher-transfer-rate recordings, it is necessary to develop a narrow-track write head that has a large recording field, a small stray field to adjacenttracks, and a sharp response to high-frequency driving. In addition to these, remanent magnetization of the head pole tip should be avoided. However, since this kind of phenomenon cannot be expressed by Maxwell's equations, a conventional analysis method is not applicable. This article describes recent progress in recording write head field analysis, including analysis methods, modeling, analyzed examples, and limitations. Possible directions of future work on the analysis of recording write head are also outlined.
2003-09-01