PHASE-TRANSITIONS IN THE SUPERIONIC PROTONIC CONDUCTOR CSHSEO4 INVESTIGATED BY BRILLOUIN SPECTROSCOPY

Authors
LUSPIN Y VAILLS Y HAURET G
Citation
Y. Luspin et al., PHASE-TRANSITIONS IN THE SUPERIONIC PROTONIC CONDUCTOR CSHSEO4 INVESTIGATED BY BRILLOUIN SPECTROSCOPY, Solid state ionics, 80(3-4), 1995, pp. 277-281
Citations number
21
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical
Journal title
Solid state ionics → ACNP
ISSN journal
01672738
Volume
80
Issue
3-4
Year of publication
1995
Pages
277 - 281
Database
ISI
SICI code
0167-2738(1995)80:3-4<277:PITSPC>2.0.ZU;2-C
Abstract
A Brillouin investigation in CsHSeO4 has been performed over the tempe rature range 20-165 degrees C which includes two phase transitions, in particular the transition to the superionic phase near T-s = 129 degr ees C. We observed strong discontinuities for elastic constants C-11, C-22 and C-33 at T-s and a broadening of the Brillouin lines above T-s . The results are discussed on the basis of a linear coupling between strains and mobile protons.