HIGH-FREQUENCY DIELECTRIC-RELAXATION IN PB(SC1 2TA1/2)O-3 CERAMICS/

Authors
CHU F SETTER N ELISSALDE C RAVEZ J
Citation
F. Chu et al., HIGH-FREQUENCY DIELECTRIC-RELAXATION IN PB(SC1 2TA1/2)O-3 CERAMICS/, Materials science & engineering. B, Solid-state materials for advanced technology, 38(1-2), 1996, pp. 171-176
Citations number
10
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Materials science & engineering. B, Solid-state materials for advanced technology → ACNP
ISSN journal
09215107
Volume
38
Issue
1-2
Year of publication
1996
Pages
171 - 176
Database
ISI
SICI code
0921-5107(1996)38:1-2<171:HDIP2C>2.0.ZU;2-O
Abstract
Pb(Sc1/2Ta1/2)O-3 ceramics have been characterized by dielectric measu rements in a wide range of frequencies (10(2)-10(9) Hz). A strong disp ersion occurs with two low and high frequency contributions below the transition temperature. Only high frequency relaxation is still observ ed at high temperature. A microscopic model of correlated chains was u sed in order to explain the latter relaxation. Dipole correlations at low temperature are responsible for the low frequency dispersion. A mi nimum in the high frequency relaxation appears at the transition tempe rature. Identical results have been observed for a Pb(Sc1/2Nb1/2)O-3 c eramic.