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dc.contributor.authorPelaiz-Barranco, A.-
dc.contributor.authorGuerra, J. D. S.-
dc.contributor.authorCalderon-Pinar, F.-
dc.contributor.authorArago, C.-
dc.contributor.authorGarcia-Zaldivar, O.-
dc.contributor.authorLopez-Noda, R.-
dc.contributor.authorGonzalo, J. A.-
dc.contributor.authorEiras, J. A.-
dc.identifier.citationJournal of Materials Science. New York: Springer, v. 44, n. 1, p. 204-211, 2009.-
dc.description.abstractRare earth (RE) and manganese-modified lead titanate ceramics were studied concerning the presence of two peaks in the temperature dependence of the dielectric permittivity. An eventual incorporation of the RE into A-site and/or B-site in the perovskite structure and the oxygen migration were considered as causes of the observed phenomenon. The structural analysis showed that at least a small amount of Ti(4+) could be substituted by the RE ions. It was considered from the pyroelectric and electrical conductivity results that, even when an eventual incorporation of the RE into the A-site and/or B-site of the structure could be possible, both peaks could not be associated with paraelectric-ferroelectric (PE-FE) phase transitions. The observed peak at lower temperatures has been associated with the PE-FE phase transitions, whereas the hopping of oxygen vacancies has been considered as the cause for the dielectric anomaly observed at higher temperatures.en
dc.description.sponsorshipThird World Academy of Sciences-
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
dc.description.sponsorshipLatin-American Network of Ferroelectric Materials-
dc.sourceWeb of Science-
dc.titleDielectric response features and oxygen migration on rare earth modified lead titanate ferroelectric ceramicsen
dc.contributor.institutionUniv La Habana-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniv Autonoma Madrid-
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)-
dc.description.affiliationUniv La Habana, Fac Fis Inst Ciência & Tecnol Mat, Havana 10400, Cuba-
dc.description.affiliationUniv Estadual Paulista, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP, Brazil-
dc.description.affiliationUniv Autonoma Madrid, Fac Ciencias, Dept Fis Mat, E-28049 Madrid, Spain-
dc.description.affiliationICIMAF, Dept Fis Aplicada, Havana 10400, Cuba-
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), Dept Fis, BR-13565905 São Carlos, SP, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP, Brazil-
dc.description.sponsorshipIdTWAS: RG/PHYS/LA No. 99-050-
dc.description.sponsorshipIdTWAS: 02-225-
dc.description.sponsorshipIdTWASciences: 05-043-
dc.description.sponsorshipIdFAPESP: 06/60013-5-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Materials Science-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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