垂直二層膜磁気記録媒体の再生減磁に与える外部磁界の影響

抄録

Demagnetization of written bits in a medium with a single-pole write head, namely, head-induced erasure, was investigated in perpendicular recording. The effects of using a single-pole head in combination with a double-layer medium in experiments were also studied. In this paper, we discuss the demagnetization of a medium by addition of an external field. A way of counteracting that field is suggested as a means of changing the permeability of the medium underlayer.