Experimental evidence of enhanced ferroelectricity in Ca doped BiFeO3

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.creatorCosta, L. V. [UNESP]
dc.creatorDeus, R. C. [UNESP]
dc.creatorFoschini, C. R. [UNESP]
dc.creatorLongo, E. [UNESP]
dc.creatorCilense, M. [UNESP]
dc.creatorSimoes, A. Z. [UNESP]
dc.date2014-12-03T13:11:47Z
dc.date2014-12-03T13:11:47Z
dc.date2014-04-15
dc.date.accessioned2023-09-09T10:17:24Z
dc.date.available2023-09-09T10:17:24Z
dc.identifierhttp://dx.doi.org/10.1016/j.matchemphys.2014.01.022
dc.identifierMaterials Chemistry And Physics. Lausanne: Elsevier Science Sa, v. 144, n. 3, p. 476-483, 2014.
dc.identifier0254-0584
dc.identifierhttp://hdl.handle.net/11449/113547
dc.identifier10.1016/j.matchemphys.2014.01.022
dc.identifierWOS:000333493400037
dc.identifier1922357184842767
dc.identifier0000-0003-1300-4978
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8763143
dc.descriptionCalcium (Ca)-doped bismuth ferrite (BiFeO3) thin films prepared by using the polymeric precursor method (PPM) were characterized by X-ray diffraction (XRD), field emission gun scanning electron microscopy (FEG-SEM), transmission electron microscopy (TEM), polarization and piezoelectric measurements. Structural studies by XRD and TEM reveal the co-existence of distorted rhombohedral and tetragonal phases in the highest doped BiFeO3 where enhanced ferroelectric and piezoelectric properties are produced by internal strain. Resistive switching is observed in BFO and Ca-doped BFO which are affected by the barrier contact and work function of multiferroic materials and Pt electrodes. A high coercive field in the hysteresis loop is observed for the BiFeO3 film. Piezoelectric properties are improved in the highest Ca-doped sample due to changes in the crystal structure of BFO for a primitive cubic perovskite lattice with four-fold symmetry and a large tetragonal distortion within the crystal domain. This observation introduces magnetoelectronics at room temperature by combining electronic conduction with electric and magnetic degrees of freedom which are already present in the multiferroic BiFeO3. (C) 2014 Elsevier B.V. All rights reserved.
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionUniv Estadual Paulista, UNESP, Fac Engn Guaratingueta, BR-12516410 Guaratingueta, SP, Brazil
dc.descriptionUniv Estadual Paulista, UNESP, Fac Engn Bauru, Dept Eng Mecan, BR-17033360 Bauru, SP, Brazil
dc.descriptionUniv Estadual Paulista, UNESP, Inst Quim, Lab Interdisciplinar Ceram LIEC, BR-1480090 Araraquara, SP, Brazil
dc.descriptionUniv Estadual Paulista, UNESP, Fac Engn Guaratingueta, BR-12516410 Guaratingueta, SP, Brazil
dc.descriptionUniv Estadual Paulista, UNESP, Fac Engn Bauru, Dept Eng Mecan, BR-17033360 Bauru, SP, Brazil
dc.descriptionUniv Estadual Paulista, UNESP, Inst Quim, Lab Interdisciplinar Ceram LIEC, BR-1480090 Araraquara, SP, Brazil
dc.format476-483
dc.languageeng
dc.publisherElsevier B.V.
dc.relationMaterials Chemistry and Physics
dc.relation2.210
dc.relation0,615
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCeramics
dc.subjectThin films
dc.subjectCoatings
dc.subjectChemical synthesis
dc.titleExperimental evidence of enhanced ferroelectricity in Ca doped BiFeO3
dc.typeArtigo


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