DESIGN AND EVALUATION OF HIGHLY FUNCTIONAL MATERIALS FOR MAGNETIC RECORDING

在超高密度磁记录介质和垂直磁记录系统磁头的应用基础上，研究了溅射、蒸发、电镀等多种方法制备高功能薄膜的方法及其性能评价。薄膜介质和磁头的微观结构必须在晶体和原子结构水平上进行控制，考虑读写系统的设计也必须重视结构控制。在此基础上，课题组讨论了Co铁氧体、Ba铁氧体、化学Co合金等不同方法组成的介质，以及一些磁头的组合。在这些系统中，提出了一种最佳系统，即具有极薄准软底层的双层介质和环形封头组合。分析了介质的微观结构，认为介质是由分散在非磁性组分中的钴基磁性颗粒组成的。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.