Abstract
In recent extremely narrow-track recording, the recording resolution at the track edge has become a crucial issue. Slight write fringing should not be permitted in future high-areal-density recording. The erase band (EB) that is formed at track edges is previously thought to be able to suppress the crosstalk noise from adjacent tracks by trim-erasure for the off-track condition. This is an advantage. However, the erase band is a randomly magnetized area that may emit track edge noise. We calculated the erase band width (EBW) accurately by a newly proposed technique, and derived the analysis type of the 747 curve by using Lee's analysis-style derivation technique. As result, we found that the peak of the track edge noise is outside of the EB and that the EB is the outbreak source of the noise. We also confirmed that a bump in the 747 curve produces without the EB noise, and that there is close relation between the shape of the 747 curve and the EB noise.
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