Optical and dielectric relaxor behaviour of Ba(Zr0.25Ti0.75)O-3 ceramic explained by means of distorted clusters

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dc.contributor.authorBadapanda, T.
dc.contributor.authorRout, S. K.
dc.contributor.authorCavalcante, L. S.
dc.contributor.authorSczancoski, J. C.
dc.contributor.authorPanigrahi, S.
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.authorLi, M. Siu
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionNatl Inst Technol
dc.contributor.institutionBirla Inst Technol
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:33:02Z
dc.date.available2014-05-20T15:33:02Z
dc.date.issued2009-09-07
dc.description.abstractIn this work, Ba(Zr0.25Ti0.75)O-3 ceramic was prepared by solid-state reaction. This material was characterized by x-ray diffraction and Fourier transform Raman spectroscopy. The temperature dependent dielectric properties were investigated in the frequency range from 1 kHz to 1 MHz. The dielectric measurements indicated a diffuse phase transition. The broadening of the dielectric permittivity in the frequency range as well as its shifting at higher temperatures indicated a relaxor-like behaviour for this material. The diffusivity and the relaxation strength were estimated using the modified Curie-Weiss law. The optical properties were analysed by ultraviolet-visible (UV-vis) absorption spectroscopy and photoluminescence (PL) measurements at room temperature. The UV-vis spectrum indicated that the Ba(Zr0.25Ti0.75)O-3 ceramic has an optical band gap of 2.98 eV. A blue PL emission was observed for this compound when excited with 350 nm wavelength. The polarity as well as the PL property of this material was attributed to the presence of polar [TiO6] distorted clusters into a globally cubic matrix.en
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 Estadual Paulista, BR-14801907 Araraquara, SP, Brazil
dc.description.affiliationUniv São Paulo, IFSC, BR-13560970 São Carlos, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, BR-14801907 Araraquara, SP, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent9
dc.identifierhttp://dx.doi.org/10.1088/0022-3727/42/17/175414
dc.identifier.citationJournal of Physics D-applied Physics. Bristol: Iop Publishing Ltd, v. 42, n. 17, p. 9, 2009.
dc.identifier.doi10.1088/0022-3727/42/17/175414
dc.identifier.issn0022-3727
dc.identifier.urihttp://hdl.handle.net/11449/41779
dc.identifier.wosWOS:000269199200044
dc.language.isoeng
dc.publisherIop Publishing Ltd
dc.relation.ispartofJournal of Physics D: Applied Physics
dc.relation.ispartofjcr2.373
dc.relation.ispartofsjr0,717
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleOptical and dielectric relaxor behaviour of Ba(Zr0.25Ti0.75)O-3 ceramic explained by means of distorted clustersen
dc.typeArtigo
dcterms.licensehttp://iopscience.iop.org/page/copyright
dcterms.rightsHolderIop Publishing Ltd
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt
unesp.departmentBioquímica e Tecnologia - IQpt

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