Ferroelectric phase transition in Pb0.60Sr0.40TiO3 thin films

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dc.contributor.authorLeal, S. H.
dc.contributor.authorPontes, F. M.
dc.contributor.authorLeite, E. R.
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.authorPizani, P. S.
dc.contributor.authorChiquito, A. J.
dc.contributor.authorMachado, MAC
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:20:03Z
dc.date.available2014-05-20T15:20:03Z
dc.date.issued2004-10-15
dc.description.abstractPolycrystalline Pb-0.Sr-60(0).40TiO3 thin films with the tetragonal perovskite structure were grown on platinum-coated silicon substrates by a chemical method. Raman results reveal that A1 (1 TO) symmetry modes, also known as soft modes, persist above the phase transition 14 temperature. This is due to the high structural distortion caused by the substitution effect of Sr2+ for Pb2+ ions. In contrast, the E(1TO) symmetry mode vanishes at 498 K, characterizing the ferroelectric-paraelectric transition phase. However, the Raman spectra, as a function of temperature, reveal that the ferroelectric-paraelectric phase transition may be correlated with a diffuse phase transition. The experimental data obtained from measurements of the dielectric constant as a function of temperature and frequencies showed a classical behavior of ferroelectric phase transition in Pb-0.Sr-60(0).40TiO3 thin films, rather than a relaxor ferroelectric phase transition. (C) 2004 Elsevier B.V. All rights reserved.en
dc.description.affiliationUFSCar, LIEC, CMDMC, Dept Chem, BR-13565905 Sao Carlos, Brazil
dc.description.affiliationUFSCar, Dept Phys, BR-13565905 Sao Carlos, Brazil
dc.description.affiliationUNESP, Inst Chem, Araraquara, Brazil
dc.description.affiliationUnespUNESP, Inst Chem, Araraquara, Brazil
dc.format.extent353-356
dc.identifierhttp://dx.doi.org/10.1016/j.matchemphys.2004.05.032
dc.identifier.citationMaterials Chemistry and Physics. Lausanne: Elsevier B.V. Sa, v. 87, n. 2-3, p. 353-356, 2004.
dc.identifier.doi10.1016/j.matchemphys.2004.05.032
dc.identifier.issn0254-0584
dc.identifier.urihttp://hdl.handle.net/11449/31406
dc.identifier.wosWOS:000223559900018
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofMaterials Chemistry and Physics
dc.relation.ispartofjcr2.210
dc.relation.ispartofsjr0,615
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectphase transitionpt
dc.subjectchemical synthesispt
dc.subjectthin filmspt
dc.subjectRaman spectroscopypt
dc.titleFerroelectric phase transition in Pb0.60Sr0.40TiO3 thin filmsen
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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