Energy Spectrum of YAG：Cr^3＋ and Thermal Shifts of Its R Lines  

作　　者：MADong-Ping CHENJu-Rong 

机构地区：[1]DepartmentofAppliedPhysics,SichuanUniversity,Chengdu610065,China//InternationalCentreforMaterialsPhysics,theChineseAcademyofSciences,Shenyang110015,China [2]DepartmentofAppliedPhysics,SichuanUniversity,Chengdu610065,China

出　　处：《Communications in Theoretical Physics》2005年第1X期165-170,共6页理论物理通讯（英文版）

摘　　要：Traditional ligand-field theory has to be improved by taking into account both "pure electronic" contribution and electron-phonon interaction one (including lattice-vibrational relaxation energy). By means of improved ligand-field theory, R1, R2, R'3, R′2, and Ri lines, U band, ground-state zero-field-splitting (GSZFS) and ground-state g factors as well as thermal shifts of R1 line and R2 line of YAG:Cr3+ have been calculated. The results are in very good agreement with the experimental data. In contrast with ruby, the octahedron of ligand oxygen ions surrounding the central Cr3+ ion in YAG:Cr3+ is compressed along the [111] direction. Thus, for YAG:Cr3+ and ruby, the splitting of t23 4A2 (or t23 2E) has opposite order, and the trigonal-field parameters of the two crystals have opposite signs. In thermal shifts of R1 and R2 lines of YAG:Cr3+, the temperature-dependent contributions due to EPI are dominant.

关 键 词：能量光谱 热量转移 斯托克司频移 配合基 

分 类 号：O562[理学—原子与分子物理]