Cr4＋离子在晶格中的结构稳定性  

Stability of Cr 4+ Ions in Crystal Structure

作　　者：徐军[1] 邓佩珍[1] 钟鹤裕[1] 王四亭[1] 陈杏达[1] 干福熹[1] 

机构地区：[1]中国科学院上海光学精密机械研究所

出　　处：《人工晶体学报》1996年第3期220-224,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金资助项目

摘　　要：本文着重从以下三个方面系统论述Ｃｒ４＋离子在Ｙ３Ａｌ５Ｏ１２晶格中的稳定性：二价补偿离子的选择；生长气氛的影响；以及Ｃｒ４＋离子的退火效应和形成动力学。分析结果表明，Ｃａ２＋离子是最佳补偿离子，氧化气氛的退火温度应高于１０００Ｋ；而Ｃｒ４＋离子在Ｙ３Ａｌ５Ｏ１２晶格中的稳定性与生长气氛无关。The stability of Cr 4+ ions in Y 3Al 5O 12 crystal has been discussed from three parts:the selection of the codopant ions(Mg or Ca),the effects of grown atmosphere and annealing conditions.These results indicate that Cr 4+ centers are formed by the charge compensation.The four fold coordinated Cr 4+ centers are formed due to intracrystalline reactions by annealing in air,taking place at the temperatures more than about 1000K.The oxidizing power of the growth atmosphere has little effect on the Cr 4+ concentration.

关 键 词：晶体 激光晶体 掺铬 晶格 稳定性 

分 类 号：TN244.03[电子电信—物理电子学]