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Metastable ferroelectric phase and crossover in the Ba2NdFeNb4−xTaxO15 TTB solid solution

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorALBINO, Marjorie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorHEIJBOER, Pierre
hal.structure.identifierLaboratoire Léon Brillouin [LLB - UMR 12]
dc.contributor.authorPORCHER, Florence
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDECOURT, Rodolphe
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorVEBER, Philippe
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAGLIONE, Mario
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorJOSSE, Michaël
dc.date.issued2018
dc.identifier.issn2050-7526
dc.description.abstractEnIn the framework of the crystal chemical investigation of Tetragonal Tungsten Bronze (TTB) niobates, the Ba2NdFeNb4−xTaxO15 solid solution has been investigated in order to gain insights on the relaxor to ferroelectric crossover and its features. Single-phase ceramics were synthesised by conventional two-step firing and sintering and they underwent extended chemical, structural, microstructural and physical characterizations. For Nb-rich compositions (x ≤ 0.5), the temperature dependence of the dielectric permittivity, the pyroelectric coefficient, and also the ferroelectric hysteresis loops revealed a nonconventional relaxor to ferroelectric crossover, which was confirmed by piezoelectric measurements for x ≤ 0.1. A thermal hysteresis of the ferroelectric transition revealed the existence of a metastable ferroelectric phase in these TTB niobates. An accurate and reliable dielectric phase diagram is established from these observations, which allows discussing the original sequence of dielectric phase transitions encountered in this solid solution.
dc.description.sponsorshipCroissance Cristalline d'Oxydes Dielectriques - ANR-09-JCJC-0079
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.title.enMetastable ferroelectric phase and crossover in the Ba2NdFeNb4−xTaxO15 TTB solid solution
dc.typeArticle de revue
dc.identifier.doi10.1039/C7TC04742H
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Materials Chemistry C
bordeaux.page1521-1534
bordeaux.volume6
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-01715186
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01715186v1
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