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Symmetry analysis of KD3(SeO3)2:SeO2−ESR spectra

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
77
Issue
1
Identifiers
DOI: 10.1016/0038-1098(91)90416-s

Abstract

Abstract The symmetry analysis of KD 3(SeO 3) 2:SeO 2 - ESR spectra, in previous publications, is incompatible with C 2h symmetry of the low temperature phase. Such incompatibility motivated a suggestion that KD 3(SeO 3) 2 might go to a pyroelectric phase at low temperature. The present work demonstrates that the correlated rotations of SeO 2 groups, induced in the phase transition, transform according to the representation B 3g of group D 2h, the same symmetry of the order parameter. Therefore, the ESR spectra are in harmony with the symmetry change in the transition D 2h → C 2h and the crystal cannot be pyroelectric.

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