Spacing Loss Characteristics of Submicron-Track Magnetic Recording

Abstract

The spacing loss characteristics of submicron-track recording were investigated by using a three-dimensional simulation program in perpendicular and longitudinal magnetic recording. The conventional spacing loss theory does not apply to the case where the track has submicron width. The playback spacing loss of a ring head increases as the track width is reduced, because of the wide fringing field on the track edge of a ring head. When the spacing is very small, submicron-track-width recording is possible in perpendicular recording. In the case of longitudinal recording, a head with a very narrow gap and contact recording are needed for submicron-track-width recording.