The structure of mixed fluorides Ca1−xSrxF2 and Sr1−xBaxF2 and the luminescence of Eu2+ in these crystals

被引：0
|
作者：
A. E. Nikiforov
A. Yu. Zakharov
V. A. Chernyshev
M. Yu. Ugryumov
S. V. Kotomanov
机构：
[1] Ural State University,
来源：
Physics of the Solid State | 2003年 / 45卷
关键词：
Spectroscopy; State Physics; Fluoride; Fluorite; Conduction Band;
D O I：
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中图分类号：
学科分类号：
摘要：
The structure of the mixed fluorites Ca1−xSrxF2 and Sr1−xBaxF2, as well as the structure of the Eu2+ impurity center in these crystals, is calculated within the framework of the virtual-crystal method realized in the shell model and pair-potential approximation. The phenomenological dependence of the position of the lower level of the 4f65d configuration of the Eu2+ ion on distance to the Eu2+-ligand is derived. The dependences of the Stokes shift and the Huang-Rhys factor on x are calculated for the yellow luminescence in Sr1−xBaxF2:Eu2+. The value of x at which the lower level of the 4f65d configuration of the Eu2+ ion in Sr1−xBaxF2:Eu2+ falls within the conduction band is found.
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页码：864 / 867
页数：3
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