Czochralski growth and characterization of Dy:La3Ga5.5Nb0.5O14 single crystals

被引：3
作者：
Yu, F. P.
Yuan, D. R. [1 ]
Zhao, X.
Duan, X. L.
Guo, S. Y.
Cheng, X. F.
Wang, X. Q.
机构：
[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
来源：
CRYSTAL RESEARCH AND TECHNOLOGY | 2009年 / 44卷 / 03期
关键词：
single crystal growth; characterization; La3Ga5.5Nb0.5O14; fluorescence decay time; TRIGONAL (LA1-XNDX)3GA5SIO14 CRYSTALS; OPTICAL SPECTROSCOPY; LANGASITE STRUCTURE; LA3GA5SIO14; LGS; DY3+ IONS; LASER; KY(WO4)(2);
D O I：
10.1002/crat.200800388
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Dysprosium (Dy) doped La3Ga5.5Nb0.5O14 single crystals were grown by the traditional Czochralski method along z-axis. The structure of the crystal has been studied by X-ray powder diffraction method, and the unit-cell parameters are calculated to be a=8.22070 angstrom, c=5.12533 angstrom and V=299.965 angstrom(3). The segregation coefficient of Dy3+ in La3Ga5.5Nb0.5O14 Crystal was measured by X-ray fluorescence analysis. For 1 mol% doping level in the melt, the distribution coefficient of Dy3+ was determined to be 0.341 wt%. Specific heat, thermal expansion and transmission spectrum of Dy: La3Ga5.5Nb0.5O14 single crystals have been measured. The fluorescence spectra of Dy3+ : La3Ga5.5Nb0.5O14 crystals were measured at room temperature, and there were four emission transitions occurring at 479, 576, 662 and 754 nm, respectively. The fluorescent lifetimes measurement results show 1.0% Dy: La3Ga5.5Nb0.5O14 possesses shorter fluorescence decay time (303.4 mu s) than does 1.0%Dy:LGS (436.12 mu s). (c) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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页码：253 / 257
页数：5
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