Abstract
In order to realize higher track density, improving recording resolution and noise at track-edge is one of crucial issues. It has been considered that the erase band (EB) which appears at track-edge can suppress the cross-talk noise from the adjacent track. On the other hand, the erase band consists of a randomly-magnetized area that may emanate track-edge noise. In this study, we estimated the accurate erase band width by a newly proposed technique and derived analytical formula of the 747 curve with large erase band noise. As a result, we found that the peak of track-edge noise corresponds to the EB position and the EB was enough of a noise source at track-edge and may be obstructive to improvement of track density. A bump of 747 curve was produced in the case of little noise of EB. There is a close relationship between the shape of the 747 curve and EB noise.
