Crystal growth,structure and crystal field splitting and fitting of Yb:GdScO_(3)  

作　　者：Jia-Hong Li Qing-Li Zhang Gui-Hua Sun Jin-Yun Gao Ren-Qin Dou Xiao-Fei Wang Shou-Jun Ding 李加红;张庆礼;孙贵花;高进云;窦仁勤;王小飞;丁守军(Key Laboratory of Photonic Devices and Materials of Anhui Province,Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei 230026,China;School of Science and Engineering of Mathematics and Physics,Anhui University of Technology,Maanshan 243002,China)

机构地区：[1]Key Laboratory of Photonic Devices and Materials of Anhui Province,Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China [2]University of Science and Technology of China,Hefei 230026,China [3]Advanced Laser Technology Laboratory of Anhui Province,Hefei 230026,China [4]School of Science and Engineering of Mathematics and Physics,Anhui University of Technology,Maanshan 243002,China

出　　处：《Chinese Physics B》2024年第11期411-416,共6页中国物理B（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant Nos.2022YFB3605700 and 2023YFB3507403);the National Natural Science Foundation of China(Grant No.52272011);the Youth Innovation Promotion Association of CAS(Grant No.2023463);Plan for Anhui Major Provincial Science&Technology Project(Grant No.202203a05020002);Open Project of Advanced Laser Technology Laboratory of Anhui Province(Grant No.AHL20220ZR04).

摘　　要：A good quality(5 at.%Yb:GdScO_(3))single crystal of F30 mm37 mm was grown successfully by the Czochralski method.Its structure is studied by the x-ray diffraction(XRD),and its atomic coordinates are obtained by Rietveld refinement.The crystal field energy level splitting of Yb^(3+)in GdScO_(3) is determined by employing the absorption and photoluminescence spectra at 8 K.Only ^(2)F_(7/2)(4)is far from the ground state ^(2)F_(7/2)(1)by 710 cm^(-1) among the crystal field energy levels split from ^(2)F_(7/2),so it is more easier to realize the laser operation of ^(2)F_(5/2)(1)^(2)F_(7/2)(4)with wavelength 1060 nm.The spin–orbit coupling parameters and intrinsic crystal field parameters(CFPs).The intrinsic crystal field parameters¯B k(k=2,4,6)of the crystal were fitted by the superposition model.The CFPs evaluated with¯Bk and coordination factor are taken as the initial parameters to fit the crystal field energy levels of the crystal,and the crystal field parameters B_(q)^(k) are obtained finally with the root-mean-square deviation 9 cm-1.It is suggested that the ligand point charge,covalency and overlap interaction are slightly weaker than charge interpenetration and coulomb exchange interaction for Yb^(3+)in GdScO_(3).The obtained Hamiltonian parameters can be used to calculate crystal field energy levels and wave functions of Yb:GdScO_(3) to analyze the mechanism of the luminescence or laser.

关 键 词：rare earth scandate crystal field PHOTOLUMINESCENCE laser crystal 

分 类 号：O614.339[理学—无机化学] O78[理学—化学]