THE SOFT MODE PHASE-TRANSITION OF SRBI2NB2O9

Authors
LIU JJ ZOU GT YANG HB CUI QL
Citation
Jj. Liu et al., THE SOFT MODE PHASE-TRANSITION OF SRBI2NB2O9, Solid state communications, 90(6), 1994, pp. 365-367
Citations number
13
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
90
Issue
6
Year of publication
1994
Pages
365 - 367
Database
ISI
SICI code
0038-1098(1994)90:6<365:TSMPOS>2.0.ZU;2-I
Abstract
A soft mode have been observed in the Raman spectra of SrBi2Nb2O9. The frequency of the soft mode decreases and the soft mode becomes overda mped on approaching the Curie point. Its linewidth diverges as GAMMA ( T) = GAMMA (0)[(T(c)-T)/T(c)]-1. The soft mode seems to be associated with the ferro- to para- electric phase transition.