THE POLAR TRANSITION OF LI-DOPED AND NB-DOPED KTAO3 - COMPARATIVE-ANALYSIS FROM HARD-PHONON RAMAN-SPECTRA

Authors
CALVI P CAMAGNI P GIULOTTO E ROLLANDI L
Citation
P. Calvi et al., THE POLAR TRANSITION OF LI-DOPED AND NB-DOPED KTAO3 - COMPARATIVE-ANALYSIS FROM HARD-PHONON RAMAN-SPECTRA, Radiation effects and defects in solids, 137(1-4), 1995, pp. 1425-1429
Citations number
15
Categorie Soggetti
Physics, Condensed Matter","Nuclear Sciences & Tecnology
Journal title
Radiation effects and defects in solids → ACNP
ISSN journal
10420150
Volume
137
Issue
1-4
Year of publication
1995
Pages
1425 - 1429
Database
ISI
SICI code
1042-0150(1995)137:1-4<1425:TPTOLA>2.0.ZU;2-0
Abstract
Raman investigations have been performed on K0.984Li0.016TaO3 and KTa0 .976Nb0.024O3 single crystals, in order to follow the peculiarities of non-ferroelectric phonons, which may be indicative of a different evo lution of microscopic order during the polar transition. Specific feat ures in the Nb case confirm a ferroelectric behaviour, whereas in the Li-doped sample the results are in agreement with a dipole glass trans ition.