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Oxygen mobility in Bi:Sr:Ca:Cu:O ceramic measured using anelastic relaxation methods

dc.contributor.authorAlbuquerque Gimenez, Juliana Maria de [UNESP]
dc.contributor.authorAlmeida, Luciano Henrique de [UNESP]
dc.contributor.authorGrandini, Carlos Roberto [UNESP]
dc.contributor.authorSouza, Fernanda Luiza de [UNESP]
dc.contributor.authorSantos, Dayse Iara [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:20:38Z
dc.date.available2014-05-27T11:20:38Z
dc.date.issued2003-03-15
dc.description.abstractSince the discovery of YBaCuO, experiments have shown that its superconducting properties are strongly affected by the oxygen content. More recently, anelastic relaxation measurements in La2CuO4+δ, showed that the decrease in the oxygen content can be related to two events. One is the decrease in mobility between two adjacent CuO planes, and the other is the increase in the number of tilting patterns of the CuO6 octahedra. In the case of the bismuth-based ceramic, it is known that the oxygen content, within some limits, does not affect its superconducting properties. In order to evaluate the mobility and the effect of the oxygen content on this material we have prepared BSCCO ceramic and tested regarding its internal friction and electrical resistivity as a function of the temperature while the oxygen content was being reduced by a sequence of vacuum annelaing at 620 K. The samples were prepared in the Bi:Sr:Ca:Cu = 2212 and 2223 proportion, using powder obtained by the sol-gel route and conventional solid state reaction. The anelastic relaxation measurements were performed using a torsion pendulum operating with frequency about 15-35 Hz between 77 to 700 K. The diffraction pattern of the as sintered and the vacuum annealed material were also presented. The results have shown complex anelastic relaxation structures that were associated to the jump of interstitial oxygen atoms between two adjacent CuO planes. The vacuum annealing showed to be deleterious to the critical temperature of the superconducting ceramic.en
dc.description.affiliationUNESP, Departamento de Física, 17.033-360, Bauru, SP
dc.description.affiliationUnespUNESP, Departamento de Física, 17.033-360, Bauru, SP
dc.format.extent584-590
dc.identifierhttp://dx.doi.org/10.4028/www.scientific.net/MSF.416-418.584
dc.identifier.citationMaterials Science Forum, v. 416-418, n. 1, p. 584-590, 2003.
dc.identifier.doi10.4028/www.scientific.net/MSF.416-418.584
dc.identifier.issn0255-5476
dc.identifier.lattes2949983867418338
dc.identifier.orcid0000-0002-3336-309X
dc.identifier.scopus2-s2.0-0037288184
dc.identifier.urihttp://hdl.handle.net/11449/132257
dc.identifier.wosWOS:000182605200096
dc.language.isoeng
dc.publisherTrans Tech Publications Ltd
dc.relation.ispartofMaterials Science Forum
dc.relation.ispartofsjr0,180
dc.rights.accessRightsAcesso restritopt
dc.sourceScopus
dc.subjectInternal friction
dc.subjectOxygen mobility
dc.subjectSuperconducting oxides
dc.subjectAnelastic relaxation methods
dc.subjectBismuth strontium calcium copper oxides
dc.subjectAnnealing
dc.subjectBismuth compounds
dc.subjectCeramic materials
dc.subjectElasticity
dc.subjectElectric conductivity
dc.subjectRelaxation processes
dc.subjectSintering
dc.subjectSuperconductivity
dc.subjectThermal effects
dc.subjectOxide superconductors
dc.titleOxygen mobility in Bi:Sr:Ca:Cu:O ceramic measured using anelastic relaxation methodsen
dc.typeArtigopt
dcterms.licensehttp://www.scientific.net/
dcterms.rightsHolderTrans Tech Publications Ltd
dspace.entity.typePublication
relation.isOrgUnitOfPublicationaef1f5df-a00f-45f4-b366-6926b097829b
relation.isOrgUnitOfPublication.latestForDiscoveryaef1f5df-a00f-45f4-b366-6926b097829b
unesp.author.lattes2949983867418338[3]
unesp.author.orcid0000-0002-3336-309X[3]
unesp.author.orcid0000-0002-9280-4334[5]
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt

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