Investigation of Cr3+ ions in Cs2NaGaF6 single crystals by optical spectroscopy

被引：49
|
作者：
da Fonseca, RJM
Tavares, AD
Silva, PS
Abritta, T
Khaidukov, NM
机构：
[1] UERJ, Inst Fis, BR-20550013 Rio De Janeiro, Brazil
[2] UFRJ, Inst Fis, BR-21945970 Rio De Janeiro, Brazil
[3] Russian Acad Sci, Inst Gen & Inorgan Chem, Moscow 117907, Russia
来源：
SOLID STATE COMMUNICATIONS | 1999年 / 110卷 / 09期
关键词：
insulators; crystal and ligand fields; optical properties; luminescence; time-resolved optical spectroscopy;
D O I：
10.1016/S0038-1098(99)00008-3
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Two different Cr3+ crystal-field sites in the elpasolite Cs2NaGaF6 were investigated by excitation and emission spectroscopy at 4.2, 77 and 300 K. The zero-phonon lines of the E-2 --> (4)A(2) transition are clearly observed on time-resolved emission spectra and associated with each type of site by high-resolution emission measurements. The different fluorescence lifetimes at 4.2 K confirm the identification of the sites. The crystal-field parameter, Dq, and Racah parameters, B and C, are determined, and we establish an intermediate crystal-field situation for both Cr3+ centers. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：519 / 524
页数：6
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