Citation
B. Pasquier et al., PHASE-TRANSITIONS IN THE ANTIFERROELECTRIC TL(DXH1-X)(2)ASO4 - A VIBRATIONAL STUDY OF THE D-RATIO EFFECT, Chemical physics letters, 278(4-6), 1997, pp. 360-364
Citations number
18
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
ISSN journal
00092614
Volume
278
Issue
4-6
Year of publication
1997
Pages
360 - 364
Database
ISI
SICI code
0009-2614(1997)278:4-6<360:PITAT->2.0.ZU;2-F
Abstract
Large features in Raman spectra of partially deuterated arsenate, Tl(D
xH(1-x))(2)AsO4 were used as test of phase transitions. The T (K) vers
us x phase diagram is not progressive with the D-ratio. Intermediate x
values, 0.3-0.7, lead to a succession of three phase transitions, con
trary to the pure isotope compounds. That behaviour is attributed to t
he very, weak dynamical participation of Tl+ cation and then primarily
to geometric isotope effects. (C) 1997 Elsevier Science B.V.