High frequency dielectric relaxation in Pb(Sc1/2Ta1/2)O-3 ceramics

Pb(Sc1/2Ta1/2)O-3 ceramics have been characterized by dielectric measurements in a wide range of frequencies (10(2)-10(9) Hz). A strong dispersion occurs with two low and high frequency contributions below the transition temperature. Only high frequency relaxation is still observed at high temperature. A microscopic model of correlated chains was used in order to explain the latter relaxation. Dipole correlations at low temperature are responsible for the low frequency dispersion. A minimum in the high frequency relaxation appears at the transition temperature. Identical results have been observed for a Pb(Sc1/2Nb1/2)O-3 ceramic.


Published in:
Materials Science and Engineering B-Solid State Materials for Advanced Technology, 38, 1-2, 171-176
Year:
1996
ISSN:
0921-5107
Keywords:
Note:
Chu, F Ecole Polytech Fed Lausanne,Mx Ecublens,Lab Ceram,Ch-1015 Lausanne,Switzerland Cnrs,Inst Chim Matiere Condensee Bordeaux,F-33608 Pessac,France
Un289
Times Cited:14
Cited References Count:10
Laboratories:




 Record created 2006-08-21, last modified 2018-03-17


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)