On the effect of ordering on vibrational spectrum of relaxor ferroelectricPbSc1/2Ta1/2O3 in paraphase

Authors
Lushnikov, SG Gvasaliya, SN Rogacheva, EA Siny, IG
Citation
Sg. Lushnikov et al., On the effect of ordering on vibrational spectrum of relaxor ferroelectricPbSc1/2Ta1/2O3 in paraphase, CRYSTALLO R, 45(3), 2000, pp. 466-468
Citations number
13
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
CRYSTALLOGRAPHY REPORTS
ISSN journal
10637745 → ACNP
Volume
45
Issue
3
Year of publication
2000
Pages
466 - 468
Database
ISI
SICI code
1063-7745(200005/06)45:3<466:OTEOOO>2.0.ZU;2-Y
Abstract
The effect of the ordering of Sc3+ and Ta5+ ions on the behavior of the pho non subsystem in the relaxer ferroelectric PbSc1/2Ta1/2O3 from the numerous AB'B-x "O-x-1(3) family has been studied. The nature of an additional cont ribution to the light-scattering spectra has been analyzed on the experimen tal data on Raman scattering in PbSc1/2Ta1/2O3, SrAl1/2Ta1/2O3, SrAl1/2Nb1/ 2O3, and BaMg1/3Ta2/3O3 compounds and inelastic neutron scattering in PbSc1 /2Ta1/2O3. It is shown that broadening of the lines in the Raman spectra of PbSc1/2Ta1/2O3 crystals is caused by additional scattering by phonons from various points of the Brillouin zone. (C) 2000 MAIK "Nauka/Interperiodica" .