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EXAFS study of lead-free relaxor ferroelectric BaTi(1-x)Zr(x)O3 at the Zr K-edge

hal.structure.identifierLaboratoire des matériaux et du génie physique [LMGP]
dc.contributor.authorLAULHÉ, Claire
hal.structure.identifierLaboratoire des matériaux et du génie physique [LMGP]
dc.contributor.authorHIPPERT, Francoise
hal.structure.identifierLaboratoire des matériaux et du génie physique [LMGP]
dc.contributor.authorKREISEL, Jens
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.authorSIMON, Annie
hal.structure.identifierLaboratoire de Cristallographie
dc.contributor.authorHAZEMAN, Jean-Louis
hal.structure.identifierService de Physique des Matériaux et Microstructures [SP2M - UMR 9002]
dc.contributor.authorNASSIF, Vivian
dc.date.created2006
dc.date.issued2006
dc.identifier.issn1098-0121
dc.description.abstractEnExtended X-ray absorption fine structure (EXAFS) experiments at the Zr K-edge were carried out on perovskite relaxor ferroelectrics BaTi(1-x)Zr(x)O3 (BTZ) (x = 0.25, 0.30, 0.35), and on BaZrO3 for comparison. Structural information up to 4.5 A around the Zr atoms is obtained, revealing that the local structure differs notably from the average Pm-3m cubic structure deduced from X-ray diffraction. In particular, our results show that the distance between Zr atoms and their first oxygen neighbors is independent of the Zr substitution rate x and equal to that measured in BaZrO3, while the X-ray cubic cell parameter increases linearly with x. Furthermore, we show that the Zr atoms tend to segregate in Zr-rich regions. We propose that the relaxor behavior in BTZ is linked to random elastic fields generated by this particular chemical arrangement, rather than to random electric fields as is the case in most relaxors.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.subject.enX-ray absorption spectroscopy
dc.subject.enEXAFS
dc.subject.enBarium zirconate titanate
dc.subject.enBZT
dc.subject.enFerroelectricity and antiferroelectricity
dc.subject.enNiobates
dc.subject.entitanates
dc.subject.entantalates
dc.subject.enPZT ceramics
dc.title.enEXAFS study of lead-free relaxor ferroelectric BaTi(1-x)Zr(x)O3 at the Zr K-edge
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevB.74.014106
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
dc.subject.halChimie/Matériaux
dc.identifier.arxivcond-mat/0602127
bordeaux.journalPhysical Review B: Condensed Matter and Materials Physics (1998-2015)
bordeaux.page014106
bordeaux.volume74
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-00021474
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00021474v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20B:%20Condensed%20Matter%20and%20Materials%20Physics%20(1998-2015)&rft.date=2006&rft.volume=74&rft.issue=1&rft.spage=014106&rft.epage=014106&rft.eissn=1098-0121&rft.issn=1098-0121&rft.au=LAULH%C3%89,%20Claire&HIPPERT,%20Francoise&KREISEL,%20Jens&MAGLIONE,%20Mario&SIMON,%20Annie&rft.genre=article


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