RAMAN-SCATTERING IN FERROELECTRIC [NH2(CH3)2]3SB2CL9 (DMACA)

被引：9

作者：

MINIEWICZ, A

LEFEBVRE, J

JAKUBAS, R

机构：

[1] UNIV LILLE 1,EQUIPE DYNAM CRISTAUX MOLEC,F-59655 VILLENEUVE DASCQ,FRANCE

[2] WROCLAW B BEIRUT UNIV,INST CHEM,PL-50383 WROCLAW,POLAND

来源：

FERROELECTRICS | 1990年 / 107卷

关键词：

D O I：

10.1080/00150199008221535

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Raman spectra (0–400 cm-1 of ferroelectric [NH2(CH3)2]3sb2Cl9 (DMACA) single crystals were studied at temperatures ranging from 100 to 300 K. A temperature dependence study of frequencies of Raman bands around ferroelectric, second order, phase transition at Tc = 242 K revealed a characteristic hardening in frequency of some bands while approaching the transition point from below. Employing the method of O’Brien and Litowitz a temperature dependence of a relaxation time of fluctuations of an order parameter τ = β/(Tc-T) has been extracted. © 1990, Taylor & Francis Group, LLC. All rights reserved.

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页码：183 / 188

页数：6

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