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hal.structure.identifierLaboratoire des Matériaux Ferroélectriques [LMF]
dc.contributor.authorABDELKAFI, Z.
hal.structure.identifierLaboratoire des Matériaux Ferroélectriques [LMF]
dc.contributor.authorABDELMOULA, Najmeddine
hal.structure.identifierLaboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
dc.contributor.authorBIDAULT, Olivier
hal.structure.identifierLaboratoire des Matériaux Ferroélectriques [LMF]
dc.contributor.authorKHEMAKHEM, Hamadi
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAGLIONE, Mario
dc.date.issued2011
dc.identifier.issn0921-4526
dc.description.abstractEnThe BaTi<sub>0.4</sub>(Fe<sub>0.5</sub>Nb<sub>0.5</sub>)<sub>0.6</sub>O<sub>3</sub> ceramic is synthesized by a solid-state reaction technique. The X-ray diffraction of the sample at room temperature shows a cubic phase. The dielectric properties are investigated as a function of frequency (20-10<sup>6</sup> Hz) at different temperatures (80-417 K). A giant low frequency dielectric permittivity (e'<sub>r</sub> ~ 3.10<sup>5</sup>) was obtained. Two dielectric relaxation peaks were observed on the curve of dielectric loss vs. temperature. The intrinsic dielectric permittivity calculated by impedance spectroscopy from the values of the obtained bulk capacitances were remarkably high 230 < e'<sub>r</sub> < 330. The extrinsic factors play an important role on their dielectric response giving rise to a giant dielectric permittivity at T>150 K. The heterogeneities conduction in the grains, grain boundaries and interfacial layers are related to a Maxwell-Wagner relaxation.
dc.language.isoen
dc.publisherElsevier
dc.typeArticle de revue
dc.identifier.doi10.1016/j.physb.2011.06.026
dc.subject.halChimie/Matériaux
bordeaux.journalPhysica B: Condensed Matter
bordeaux.page3470-3474
bordeaux.volume406
bordeaux.issue18
bordeaux.peerReviewedoui
hal.identifierhal-00610389
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00610389v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Physica%20B:%20Condensed%20Matter&amp;rft.date=2011&amp;rft.volume=406&amp;rft.issue=18&amp;rft.spage=3470-3474&amp;rft.epage=3470-3474&amp;rft.eissn=0921-4526&amp;rft.issn=0921-4526&amp;rft.au=ABDELKAFI,%20Z.&amp;ABDELMOULA,%20Najmeddine&amp;BIDAULT,%20Olivier&amp;KHEMAKHEM,%20Hamadi&amp;MAGLIONE,%20Mario&amp;rft.genre=article


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