Low-temperature vibrational properties of KGd(WO4)2: (Er, Yb) single crystals studied by Raman spectroscopy

被引：12
|
作者：
Kasprowicz, D. [1 ]
Runka, T. [1 ]
Majchrowski, A. [2 ]
Michalski, E. [2 ]
机构：
[1] Poznan Tech Univ, Fac Tech Phys, PL-60965 Poznan, Poland
[2] Mil Univ Technol, Inst Appl Phys, PL-00908 Warsaw, Poland
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2009年 / 70卷 / 09期
关键词：
Optical materials; Raman spectroscopy; Lattice dynamics; OPTICAL SPECTROSCOPY; UP-CONVERSION; TUNGSTATES; SPECTRA; GROWTH; LASERS; NA; LN;
D O I：
10.1016/j.jpcs.2009.07.015
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Temperature-dependent polarized Raman spectra of KGd(WO4)(2): (Er, Yb) single crystals have been analyzed over the 77-292 K temperature range. The A(g) and B-g spectra obtained are discussed in terms of factor group analysis. The spectra have been found to reveal the bands related to internal and external vibrations of WO42-, WOW and WOOW molecular groups. Strong depolarization of the majority of the Raman bands has been observed in the whole temperature range. Some anomalies in the spectral parameters of selected Raman bands below 175 K have been discussed in terms of the local distortion of WO42- ions in KGd(WO4)(2): (Er, Yb) crystals. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1242 / 1247
页数：6
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