Structure and optical properties of [Ba1-xY2x/3](Zr0.25Ti0.75)O-3 powders

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dc.contributor.authorSczancoski, J. C.
dc.contributor.authorCavalcante, L. S. [UNESP]
dc.contributor.authorBadapanda, T.
dc.contributor.authorRout, S. K.
dc.contributor.authorPanigrahi, S.
dc.contributor.authorMastelaro, V. R.
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.authorLi, M. Siu
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionNatl Inst Technol
dc.contributor.institutionBirla Inst Technol
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:32:09Z
dc.date.available2014-05-20T15:32:09Z
dc.date.issued2010-07-01
dc.description.abstract[Ba1-xY2x/3](Zr0.25Ti0.75)O-3 powders with different yttrium concentrations (x = 0, 0.025 and 0.05) were prepared by solid state reaction. These powders were analyzed by X-ray diffraction (XRD). Fourier transform Raman scattering (FT-RS), Fourier transform infrared (FT-IR) and X-ray absorption near-edge (XANES) spectroscopies. The optical properties were investigated by means of ultraviolet-visible (UV-vis) absorption spectroscopy and photoluminescence (PL) measurements. Even with the addition of yttrium, the XRD patterns revealed that all powders crystallize in a perovskite-type cubic structure. FT-RS and FT-IR spectra indicated that the presence of [YO6] clusters is able to change the interaction forces between the O-Ti-O and O-Zr-O bonds. XANES spectra were used to obtain information on the off-center Ti displacements or distortion effects on the [TiO6] clusters. The different optical band gap values estimated from UV-vis spectra suggested the existence of intermediary energy levels (shallow or deep holes) within the band gap. The PL measurements carried out with a 350 nm wavelength at room temperature showed that all powders present typical broad band emissions in the blue region. (C) 2010 Elsevier Masson SAS. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, BR-14801907 Araraquara, SP, Brazil
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), BR-13565905 São Carlos, SP, Brazil
dc.description.affiliationNatl Inst Technol, Dept Phys, Rourkela 769008, India
dc.description.affiliationBirla Inst Technol, Dept Appl Phys, Ranchi 835215, Bihar, India
dc.description.affiliationUniv São Paulo, IFSC, BR-13560970 São Carlos, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, BR-14801907 Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipLaboratório Nacional de Luz Síncrotron (LNLS)
dc.description.sponsorshipIdFAPESP: 09/50303-4
dc.description.sponsorshipIdLNLS: D04B - XAFS1 - 8823
dc.format.extent1160-1167
dc.identifierhttp://dx.doi.org/10.1016/j.solidstatesciences.2010.04.002
dc.identifier.citationSolid State Sciences. Amsterdam: Elsevier B.V., v. 12, n. 7, p. 1160-1167, 2010.
dc.identifier.doi10.1016/j.solidstatesciences.2010.04.002
dc.identifier.issn1293-2558
dc.identifier.urihttp://hdl.handle.net/11449/41132
dc.identifier.wosWOS:000280381200021
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofSolid State Sciences
dc.relation.ispartofjcr1.861
dc.relation.ispartofsjr0,574
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectBa(Zr,Ti)O-3en
dc.subjectVacanciesen
dc.subjectLattice defectsen
dc.subjectBand gapen
dc.subjectPhotoluminescenceen
dc.titleStructure and optical properties of [Ba1-xY2x/3](Zr0.25Ti0.75)O-3 powdersen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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