DIELECTRIC AND THERMAL STUDIES OF THE LOW-TEMPERATURE PHASE-TRANSITION IN BACL2-CENTER-DOT-2H(2)O SINGLE-CRYSTALS

Authors
BANERJEE G GHOSH AK DEY PK CHAUDHURI BK
Citation
G. Banerjee et al., DIELECTRIC AND THERMAL STUDIES OF THE LOW-TEMPERATURE PHASE-TRANSITION IN BACL2-CENTER-DOT-2H(2)O SINGLE-CRYSTALS, Phase transitions, 42(3-4), 1993, pp. 231-240
Citations number
25
Categorie Soggetti
Crystallography,"Physics, Condensed Matter
Journal title
Phase transitions → ACNP
ISSN journal
01411594
Volume
42
Issue
3-4
Year of publication
1993
Part
A
Pages
231 - 240
Database
ISI
SICI code
0141-1594(1993)42:3-4<231:DATSOT>2.0.ZU;2-6
Abstract
From specific heat, thermal expansion, and dielectric constant measure ments between 150 and 300 K we have confirmed the low temperature phas e transition in barium chloride dihydrate (BaCl2.2H(2)O) at 195 +/- 1 K. This transition appears to be associated with the local ordering (o r displacements) of the two water molecules in the crystal. A ''pseudo spin'' type model is proposed to explain the transition mechanism.