Raman studies of ferroelectric phase transition in [NH2(CH3)2]3Sb2Cl9(DMACA)

被引：15

作者：

Bator, G

Jakubas, R

Lefebvre, J

Guinet, Y

机构：

[1] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland

[2] Univ Lille 1, UFR Phys, Lab Dynam & Struct Mat Mol UA 801, F-59655 Villeneuve Dascq, France

来源：

VIBRATIONAL SPECTROSCOPY | 1998年 / 18卷 / 02期

关键词：

Raman spectroscopy; phase transition; halogenoantimonates(III);

D O I：

10.1016/S0924-2031(98)00087-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The ferroelectric phase transition at 242 K in single crystals of [(CH3)(2)NH2](3)Sb2Cl9 (DMACA) has been investigated by the Raman spectroscopy over the range 3500-400 cm(-1). The temperature dependencies of the wave numbers, damping coefficients and intensities of the bands corresponding to the symmetric, nu(s), and asymmetric, nu(as), NC2 stretching vibrations were analysed in detail. The Raman studies confirm that the mechanism of the ferroelectric phase transition of the order-disorder type is governed by changes in dynamical state of the dimethylammonium cations. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：203 / 210

页数：8

共 20 条

[1] The structure and vibrational spectra of some ferroelectric and ferroelastic alkylammonium halogenoantimonates(III) and bismuthates(III) [J].