DESIGN AND EVALUATION OF HIGHLY FUNCTIONAL MATERIALS FOR MAGNETIC RECORDING

以高密度磁记录介质和垂直磁记录磁头为应用背景，研究了溅射、蒸镀和电镀等多种方法制备高性能薄膜的方法和评价方法。用于介质和磁头的薄膜的微结构必须在晶体和原子结构水平上进行控制，并且考虑到读/写系统的设计也应该关注结构控制。基于这一思想，课题组讨论了钴铁氧体、钡铁氧体、化学镀钴合金等不同方法构成的介质，以及几种磁头的组合，并提出了一种最佳系统，即具有极薄准软底层的双层介质与环形磁头的组合。介质的微观结构也被分析为由Co基磁性颗粒分散在非磁性组分中组成。我们在几次会议上讨论了这些结果。

The formation and evaluation on highly functional thin films by various methods such as sputtering, evaporating and plating were studied on the basis of the application of them to ultrahigh density magnetic recording media and heads for perpendicular magnetic recording system. The microstructure of thin films for the media and head has to be controlled with crystal and also atomic structure level, and also the design considering the read/write systems should be paid to the structure control. On the basis of such idea, the research group discussed the media consisted of different methods such as Co ferrite, Ba ferrite, electroless Co alloys, and also the combination of some heads.In those systems, one of the optimum systems, double layered media with very thin quasi-soft underlayer with a combination of ring type head is proposed. The microstrucure of media is also analyzed to be composed of Co base magnetic particles dispersed in the non-magnetic components. Such results were discussed at our several meetings.