SYMMETRY ANALYSIS OF KD3(SEO3)2-SEO2- ESR-SPECTRA

被引：0
作者：
DASILVA, JCM
CHAVES, AS
RIBEIRO, GM
GAZZINELLI, R
机构：
[1] Departamento de Física, Universidade Federal de Minas Gerais, 30.161 Belo Horizonte-M.G.
来源：
SOLID STATE COMMUNICATIONS | 1991年 / 77卷 / 01期
关键词：
D O I：
10.1016/0038-1098(91)90416-S
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The symmetry analysis of KD3(SeO3)2:SeO2BAR ESR spectra, in previous publications, is incompatible with C2h symmetry of the low temperature phase. Such incompatibility motivated a suggestion that KD3(SeO3)2 might go to a pyroelectric phase at low temperature. The present work demonstrates that the correlated rotations of SeO2 groups, induced in the phase transition, transform according to the representation B3g of group D2h, the same symmetry of the order parameter. Therefore, the ESR spectra are in harmony with the symmetry change in the transition D2h --> C2h and the crystal cannot be pyroelectric.
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页码：5 / 9
页数：5
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