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Dielectric characteristics of Ce 3+ doped Sr 0.61 Ba 0.39 Nb 2 O 6 with Cole‐Cole plots technique
Author(s) -
Şentürk E.
Publication year - 2004
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200310164
Subject(s) - dielectric , ferroelectricity , relaxation (psychology) , phase transition , doping , cole–cole equation , dielectric spectroscopy , condensed matter physics , analytical chemistry (journal) , debye , permittivity , materials science , phase (matter) , debye model , chemistry , physics , psychology , social psychology , optoelectronics , organic chemistry , electrode , electrochemistry , chromatography
In this paper, we have investigated two‐relaxator mechanism and dielectric characteristics of Ce 3+ doped Sr 0.61 Ba 0.39 Nb 2 O 6 with dielectric spectroscopy measurements. The crystal undergoes a ferroelectric phase transition at 340 K. The temperature dependence of the real and imaginer part of the complex dielectric susceptibility in vicinity of ferroelectric‐paraelectric phase transition has been studied in the frequency region 0.1 kHz–10 MHz. The measurements of the dielectric constant of the real and imaginer parts show strongly frequency dependence. The investigations of the dielectric constant revealed a non‐Debye type dielectric relaxation for Ce +3 doped SBN61 by using Cole‐Cole plots. It reveals the coexistence of the two dielectric relaxators in vicinity of the phase transition. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)