Dynamical Properties of the Partially Disordered Crystals of Cs5H3(SO4)4·xH2O
Source: Ferroelectrics, Volume 285, Number 1, 2003 , pp. 119-132(14)
Publisher: Taylor and Francis Ltd
Abstract:This paper presents studies of lattice dynamics of a crystal of Cs5H3(SO4)4·xH2O (PCHS) and its deuterated analog Cs5D3(SO4)4·xD2O (DPCHS) in wide temperature and frequency ranges by dielectric spectroscopy and modulated temperature differential scanning calorimetry. It is shown that deuteration of PCHS gives rise to an additional structural phase transition at Tc3 250 K. The temperature of the isostrctural phase transition Tc2 (372 K for PCHS and 370 K for DPCHS) has been determined more accurately. It has been found that deuteration does not suppress phase transition at Tc2. The temperature dependence of dielectric response is analyzed.
Document Type: Research article
Affiliations: 1: A. F. Ioffe Physical Technical Institute, Russian Academy of Science, 194021 St.Petersburg, Russia 2: Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan 3: Institute of Crystallography, Russian Academy of Science, 117333 Moscow, Russia
Publication date: 2003-01-01