摘要
基于对ＢｉＡｌＤｙＩＧ巨磁光材料的紫蓝光波段法拉第角频谱分析，采用新型热分解法工艺合成优质ＢｉＡｌＤｙＩＧ磁光薄膜，经快速循环晶化处理的结果表明，由于晶粒细化，其平均有效法拉第角比常规热处理后的样品大０．５°左右，且随循环数增加而增大。同时由于Ａｌ３＋在四面体和八面体位的取代，导致居里温度下降（１４０～１６０℃）。
Based on the analysis of frequency spectrum of Faraday angle in blue and violet light ranges for BiAlDyIG materials, we have perpared a fine quality BiAlDyIG thin film by a pyrolysis method and crystalized the film with rapid recurrent thermal annealing. The effective Faraday angle of RRTA sample is over about 0.5 degree larger than that of the common samples, and its Faraday angle increases with the number of recurrent annealing increasing, which is due to the finess of the grain and many Bi 3+ -O 2- -Fe 3+ are informed. Meanwhile, the concentration variation of Al 3+ ions in octahedral and tetrahedral sites results in a decrease of curie temperature (140￣160℃). These results are very promising for improving the recording density and signal noise ratio.
出处
《中国激光》
EI
CAS
CSCD
北大核心
1998年第11期976-980,共5页
Chinese Journal of Lasers
基金
国家教委优秀青年基金
关键词
磁光
石榴石
磁光盘
记录密度
magneto optical, grain, recording density, magneto optical disk
