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磁盘存储器已在现代微型计算机系统中广泛应用。近几年来，磁盘、光盘正在普及，同时，新型的外部存储器磁光盘也正悄然兴起。1磁光盘的基本工作原理磁光盘是利用特殊的磁光材料作为介质而制成的，它有如下特性：在常温下它的磁性不受外磁场影响，很难改变；但在高温条件下，微
Disk storage is widely used in modern microcomputer systems. In recent years, disks and optical disks are gaining popularity. At the same time, the new type of external memory magneto-optical disk is also quietly rising. 1 The basic principle of magneto-optical disk Magneto-optical disk is the use of special magneto-optical material as a medium and made it has the following characteristics: its magnetic properties at room temperature from the external magnetic field is difficult to change; but under high temperature conditions, micro-