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中科院物理所科技人员经过一年来的努力,在第二代信息可擦除磁光光盘材料方面,已研制成一种锰基多元合金的新材料。磁光盘信息存储密度为通常磁盘的10～100倍,它具有非接触、使用可靠等优点,目前这一高技术正步入实用化阶段。近几年来磁光材料在不断开发,一般采用的存储材料为 IBM 公司开发的十分之一微米厚的非晶态铽铁钴或钆铽铁薄膜。由于非晶态是亚稳结构,热稳定性差且易氧化,磁光效应弱,也就是反射激光束的偏振面相对于入射时的转角较小(转角称克尔转角),
After a year of hard work, scientists and technologists at the Physics Institute of the Chinese Academy of Sciences have developed a new type of manganese-based multi-alloy material in the field of second-generation information-erasable magneto-optical disks. Magneto-optical disk information storage density of 10 to 100 times the usual disk, it has a non-contact, reliable use, etc., at present this high-tech is entering the practical stage. In recent years, the continuous development of magneto-optical materials, generally used storage materials developed by IBM Corporation one tenth of a micron thick amorphous terbium cobalt or gadolinium terbium iron film. As the amorphous state is a metastable structure, poor thermal stability and easy oxidation, magneto-optical effect is weak, that is, the reflected laser beam polarization angle relative to the incident angle is smaller (corner referred to Kerr rotation)