SmTbFeCo磁光记录材料温度特性的平均场理论研究  

Mean-Field Theory Study of the Amorphous SmTbFeCo Magneto-Optical Recording Thin Films

作　　者：卢正启[1] 李佐宜[1] 郑远开[1] 

机构地区：[1]华中理工大学团体电子学系,武汉430074

出　　处：《磁性材料及器件》1997年第3期12-16,共5页Journal of Magnetic Materials and Devices

摘　　要：基于平均场理论，提出重稀土-轻稀土-过渡族（HRE－LRE-TM）非晶薄膜温度特性的计算方法，详细讨论了薄膜成分对薄膜磁学和磁光性能的影响。研究表明，用适量的轻稀土元素替代重稀土元素，室温下饱和磁化强度增大，克尔角有所提高，薄膜的补偿点温度下降，而居里点温度基本保持不变，并区饱和磁化强度和矫顽力随温度变化趋向缓慢，从而可以拓宽磁光介质的使用温度范围。其对重稀土-过渡族非晶薄膜掺入轻稀土元素是否改善磁学和磁大性能作出了满意的解释。Based on the mean-field theory,a method to calculate the tenperature de-pendence of the amorphous SmTbFeCo magneto-optical thin films is proposed,and the influence ofthe compositions of the films on the magnetic and magneto-optical properties discussed in detail.The results show that with substitution of Sm for Tb, the saturation magnetization at room tern-perature and Kerr angle increase, compensation temperature Tcomp decreases, Curie temperature Tcrernains unchanged,and saturation magnetization and coercivity versus temperature change slowly.Therefore, the application temperature range of magneto-optical media can be broadened. A goodexplanation is given to whether the LRE addition to HRE-TM arnorphous thin films improvesmagnetic and magneto-optical properties.

关 键 词：HRE-LRE-TM 非晶薄膜 磁光记录材料 平均场理论 

分 类 号：TQ584[化学工程—精细化工]