Isotope effect in Cs5H3(SO4)(4)center dot 0.5H(2)O crystals

Authors
Lushnikov, SG Belushkin, AV Beskrovnyi, AI Fedoseev, AI Gvasaliya, SN Shuvalov, LA Schmidt, VH
Citation
Sg. Lushnikov et al., Isotope effect in Cs5H3(SO4)(4)center dot 0.5H(2)O crystals, SOL ST ION, 125(1-4), 1999, pp. 119-123
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE IONICS
ISSN journal
01672738 → ACNP
Volume
125
Issue
1-4
Year of publication
1999
Pages
119 - 123
Database
ISI
SICI code
0167-2738(199910)125:1-4<119:IEICD0>2.0.ZU;2-8
Abstract
The sequence of phase transitions at temperatures from 290 to 420 K in the crystals of Cs5H3(SO4)(4) . 0.5H(2)O (CTSM) and Cs5D3(SO4)(4) . 0.5D(2)O (D CTSM) was studied by Brillouin Light scattering and neutron diffraction. An omalies in the temperature dependences of the velocity and damping of hyper sonic acoustic phonons in the vicinity of 360 K were observed in the CTSM c rystal. In contrast, no anomalies were found in the DCTSM crystal. Prelimin ary analysis of neutron diffraction data does not show symmetry changes in the temperature range studied. Thus it has been found that deuteration of t he CTSM crystals leads to a change in the sequence of phase transitions. (C ) 1999 Published by Elsevier Science B.V. All rights reserved.