We have developed Soft-Adjacent-Layer (SAL)-biased MR head products with two types of permanent magnet (PM) domain stabilization schemes, namely, abutted and overlaid. Both types of MR heads are capable of achieving recording density of 500 Mb/in/sup 2/ with linear bit densities ranging from 100-118 kbpi. While transfer curves with a transverse sweeping field showed similar behavior for both PM schemes, the overlaid structure has a large hysteresis in its transfer curve under a longitudinal sweeping field while the abutted junction was hysteresis free. Micromagnetic modeling showed that the hysteresis for the overlaid scheme arises from the varying field response of the MR element in the active region, under the leads and under the PM. Magnetic test shows that the abutted MR head with a PM defined TW had a slower rise in sensitivity and had an effectively narrower magnetic track width. On the other hand, the overlaid MR head with an active region defined by the leads with MR under them has a steeper rise in sensitivity, a broadened magnetic read track and side readings.
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机译：我们已经开发了带有软相邻层（SAL）的MR磁头产品，该磁头产品具有两种永磁体（PM）域稳定方案，即邻接和重叠。两种类型的MR磁头都能实现500 Mb / in / sup 2 /的记录密度，线性位密度范围为100-118 kbpi。尽管在两种PM方案下，具有横向扫掠场的传递曲线都表现出相似的行为，但是在纵向扫掠场下，重叠结构的传递曲线具有较大的滞后现象，而邻接的结点没有滞后现象。微磁建模表明，叠加方案的磁滞是由于有源区，引线下方和PM下的MR元件的变化场响应引起的。磁测试表明，带有PM定义为TW的对接MR头的灵敏度上升较慢，磁道宽度实际上更窄。另一方面，覆盖的MR磁头具有一个有效区域，该有效区域由在其下具有MR的引线所定义，具有更大的灵敏度，更宽的磁读取迹线和侧面读数。
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