摘要
利用Ｒａｃａｈ不可约张量算符法和Ｗｉｎｇｅｒ定理，建立了ｄ３（Ｃ３ｖ）电子组态的能量矩阵及其全组态ＥＰＲ理论；借助Ｎｅｗｍａｎ的叠加晶场模型和自旋哈密顿理论，研究了ＥＰＲ参量与ＬｉＴａＯ３∶Ｃｒ３＋晶体结构参数之间的定量关系。在此基础上，研究了ＬｉＴａＯ３∶Ｃｒ３＋的ＥＰＲ参量及其电子光谱，理论与观测一致。定量研究表明：ＬｉＴａＯ３∶Ｃｒ３＋晶体中，Ｃｒ３＋离子取代了Ｔａ５＋离子而不是Ｌｉ＋离子。
In terms of the Racah irreducible tensor operator techigue and Winger theorem,the energy matrices and the electron paramagnetic resonance (EPR) theory of the full configuration state of for d 3( C 3 v ) electric configuration state have been derived.The relationship between the EPR parameters and the crystal structure parameters in LiTaO 3∶Cr 3+ are established according to the Newman superposition model and the spin Hamilton theory.By using these,the EPR parameters and electric spectrum of LiTaO 3∶Cr 3+ crystal are studied.The agreements between the calculated results and the experimental data show that quantiatively the impurities Cr 3+ replace the Ta 5+ rather than Li + ions in LiTaO 3∶Cr 3+ crystal.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
1998年第4期13-18,共6页
Journal of Synthetic Crystals
基金
陕西省自然科学基金
陕西省教委专项基金
