ANALYSIS OF TRACK-EDGE NOISE IN THIN-FILM RECORDING MEDIA

Track-edge noise has been analyzed to clarify track-edge noise mechani sms, Edge noise arises from two different regions: the bit edge where the magnetization direction is opposite to the previously de-erased di rection and the magnetic transition edge, The edge noise at low densit y is mainly due to the magnetic distribution at the bit edge, The tran sition edge noise increases with increasing recording density, and it becomes dominant at high-recording density for an oriented medium, On the other hand, the transition edge noise is almost constant with incr easing recording density for an isotropic medium.