HIGH-FREQUENCY RELAXATIONS IN PB2K(NB1-XTAX)(5)O-15 CERAMICS 0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1)

Authors
BONNET JP LU ZG RAVEZ J HAGENMULLER P
Citation
Jp. Bonnet et al., HIGH-FREQUENCY RELAXATIONS IN PB2K(NB1-XTAX)(5)O-15 CERAMICS 0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1), Physica status solidi. a, Applied research, 153(1), 1996, pp. 249-255
Citations number
8
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. a, Applied research → ACNP
ISSN journal
00318965
Volume
153
Issue
1
Year of publication
1996
Pages
249 - 255
Database
ISI
SICI code
0031-8965(1996)153:1<249:HRIPC0>2.0.ZU;2-6
Abstract
Dielectric spectroscopy in the 10(6) to 10(9) Hz range is reported for ceramics of the Pb2K(Nb1-xTax)(5)O-15 solid solution of tetragonal tu ngsten bronze-derived structure. Two dielectric relaxations are observ ed. The first one, which exists for all compositions in both ferroelec tric and paraelectric states, must be related to the structure of the materials. The second one, which appears only in the ferroelectric sta te and whose contribution to the permittivity increases with increasin g diffuseness of the paraelectric-ferroelectric transition, is related to composition fluctuations.