Evidence of ferroelectric behaviour in CaCu3Ti4O12 thin films deposited by RF-sputtering

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dc.contributor.authorFoschini, Cesar R. [UNESP]
dc.contributor.authorHangai, Bruno [UNESP]
dc.contributor.authorOrtega, Pedro Paulo [UNESP]
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.authorCilense, Mário [UNESP]
dc.contributor.authorSimões, Alexandre Z. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2020-12-12T02:27:40Z
dc.date.available2020-12-12T02:27:40Z
dc.date.issued2019-01-01
dc.description.abstractThe origin of abnormal ferroelectric and unusual piezoelectricity in the polycrystalline CaCu3Ti4O12 (CCTO) thin films deposited by RF-sputtering on Pt/Ti/SiO2/Si (100) substrates was explored. The CCTO thin films, deposited at room temperature followed by annealing at 600 °C for 2 h in a conventional furnace, have a cubic structure with lattice parameter a = 7.379 ± 0.001 Å and without any secondary phases. No polarization loss up to 1010 switching cycles, with a switched polarization ∆P of 30 µC/cm2 measured at 400 kV/cm was evidenced. The piezoelectric coefficient investigated by piezoresponse force microscopy (PFM) was approximately 9.0 pm/V. This may be the very first example of exploring the origin of ferroelectric behaviour for a material that possesses space charge polarization with highly resistive grain boundaries in the polycrystalline state.en
dc.description.affiliationSão Paulo State University (UNESP) School of Engineering of Bauru, Av. Eng. Luiz Edmundo C. Coube 14-01
dc.description.affiliationSão Paulo State University (UNESP) School of Engineering of Guaratinguetá, Av. Dr. Ariberto Pereira da Cunha 333
dc.description.affiliationSão Paulo State University (UNESP) – Chemistry Institute, R. Prof. Francisco Degni 55
dc.description.affiliationUnespSão Paulo State University (UNESP) School of Engineering of Bauru, Av. Eng. Luiz Edmundo C. Coube 14-01
dc.description.affiliationUnespSão Paulo State University (UNESP) School of Engineering of Guaratinguetá, Av. Dr. Ariberto Pereira da Cunha 333
dc.description.affiliationUnespSão Paulo State University (UNESP) – Chemistry Institute, R. Prof. Francisco Degni 55
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2013/07296-2
dc.format.extent219-228
dc.identifierhttp://dx.doi.org/10.2298/PAC1903219F
dc.identifier.citationProcessing and Application of Ceramics, v. 13, n. 3, p. 219-228, 2019.
dc.identifier.doi10.2298/PAC1903219F
dc.identifier.issn2406-1034
dc.identifier.issn1820-6131
dc.identifier.lattes1922357184842767
dc.identifier.orcid0000-0003-1300-4978
dc.identifier.scopus2-s2.0-85073612584
dc.identifier.urihttp://hdl.handle.net/11449/201243
dc.language.isoeng
dc.relation.ispartofProcessing and Application of Ceramics
dc.sourceScopus
dc.subjectCalcium copper titanate
dc.subjectCCTO
dc.subjectFerroelectricity
dc.subjectRF-sputtering
dc.subjectThin films
dc.titleEvidence of ferroelectric behaviour in CaCu3Ti4O12 thin films deposited by RF-sputteringen
dc.typeArtigo
unesp.author.lattes1922357184842767[1]
unesp.author.orcid0000-0003-1300-4978[1]

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