Crystal growth, structure and crystal field splitting and fitting of Yb:GdScO3

被引:0
|
作者
Li, Jia-Hong [1 ,2 ,3 ]
Zhang, Qing-Li [1 ,3 ]
Sun, Gui-Hua [1 ,3 ]
Gao, Jin-Yun [1 ,3 ]
Dou, Ren-Qin [1 ,3 ]
Wang, Xiao-Fei [1 ,3 ]
Ding, Shou-Jun [1 ,3 ,4 ]
机构
[1] Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Key Lab Photon Devices & Mat Anhui Prov, Hefei 230031, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Peoples R China
[3] Adv Laser Technol Lab Anhui Prov, Hefei 230026, Peoples R China
[4] Anhui Univ Technol, Sch Sci & Engn Math & Phys, Maanshan 243002, Peoples R China
基金
中国国家自然科学基金;
关键词
rare earth scandate; crystal field; photoluminescence; laser crystal; SPECTROSCOPIC PROPERTIES; LASER; GDSCO3; RE;
D O I
10.1088/1674-1056/ad72d3
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A good quality (5 at.% Yb:GdScO3) single crystal of Phi 30 mm x 37 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 Yb3+ in GdScO3 is determined by employing the absorption and photoluminescence spectra at 8 K. Only 2F(7/2) (4) is far from the ground state 2F(7/2 )(1) by 710 cm-1 among the crystal field energy levels split from 2F(7/2 ) , so it is more easier to realize the laser operation of 2F(5/2) (1)-> 2(7/2 ) (4) with wavelength 1060 nm. The spin-orbit coupling parameters and intrinsic crystal field parameters (CFPs). The intrinsic crystal field parameters B<overline> k (k = 2, 4, 6) of the crystal were fitted by the superposition model. The CFPs evaluated with B<overline> k 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 k q 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 Yb3+ in GdScO3. The obtained Hamiltonian parameters can be used to calculate crystal field energy levels and wave functions of Yb:GdScO3 to analyze the mechanism of the luminescence or laser.
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页数:6
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