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Raman scattering in ferroelectric [NH2(CH3)2]3Sb2Cl9 (DMACA).
Autorzy
Rok wydania
1990
Czasopismo
Numer woluminu
107
Strony
183-188
DOI
10.1080/00150199008221535
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
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.
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