The PDF file is not available.
Ken-ichi Kitamura, Sony Corporation
Here, we have evaluated the merits of ANSYS and JMAG with respect to excess eddy current analysis for thin-film heads. In conclusion, our calculations were carried out by creating a mesh model using the ANSYS pre/post solid modeler/mesher, and then reading that model into JMAG-Works via a NASTRAN format file. Using the results of this analysis, we measured the write time shift to evaluate the eddy current-caused recording field phase delay and, comparing results obtained from models using different yoke lengths and properties, attempted to design a head suited to high recording frequencies. The results appear to indicate that it would be possible to design a head able to handle bit frequencies of 1 Gbps by shortening the head’s magnetic path and by using high Rho NiFe for its materials.