ＮｉＯ磁区制御ＭＲヘッドの感度分布特性

Abstract

The track profile characteristics of MR heads with an NiO domain control layer were investigated. The track profile is affected by the sense current, the electrode distance, the MR height, and the distance of domain control layer. If the electrode distance is smaller than the MR height, the peak amplitude of the track profile becomes small.We observed the track profiles on three types of head structure. In one, the domain control (DC) distance is wider than the electrode distance (type A). In another, the DC distance and the electrode distance are the same (type B). In the third, the DC distance is smaller than the electrode (type C).The magnetic track width of type A is wider than that of type B, when their electrode distances are almost the same. The track profile of type B is strongly affected by NiO exchange coupling. The sensitivity of type B is smaller than that of type A.