Abstract

Magneto-optical recording using field modulation has been shown previously to be an effective method for achieving direct overwrite.^1,2 One disadvantage of this technique, however, is that high data rate operation requires the coil diameter and coil-to-media spacing to be small. This limitation is a result of the stored magnetic field energy which must be refreshed each time the field is reversed. The resonant bias coil overwrite technique, which was introduced recently,³ largely overcomes this problem and allows high frequency operation with coil-to-media spacings on the order of 1 mm. This paper presents recent recording results using this technique and discusses some data coding implications.

© 1989 Optical Society of America