Growth and optical properties of NaY(WO4)2:: Eu crystals
Growth and optical properties of NaY(WO4)2:: Eu crystals
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DOI：
10.1002/1521-4079(200102)36:2
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发表时间：
2001-01-01
影响因子：
1.5
通讯作者：
Yang, J
中科院分区：
文献类型：
--
作者：
Cheng, ZX;Zhang, SJ;Yang, J
NaY_（0.99）Eu_（0.01）（WO_4）（2）晶体沿沿着和方向生长。从熔体中沿沿着方向生长，只要偏离化学计量比成分较小，就可以获得高质量的单晶。Eu离子在生长态晶体中以两价存在，在退火后仅以一价存在。荧光光谱表明Eu离子的能级Stark劈裂符合S-4的格位对称性。
NaY0.99Eu0.01(WO4)(2) crystals were grown along and directions. Single crystals with high quality can be obtained when they were grown along direction from a melt with a small deviation from stoichiometric composition. Eu ions exist in two valences in the as-grown crystals, in one valence after annealing only. The fluorescence spectrum shows the Stark splittings of energy levels of Eu ions is in accordance with the site symmetry of S-4.