Study of interstitial oxygen mobility in RuSr2GdCu2O8 by internal friction

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dc.contributor.authorGimenez, J. M. A. [UNESP]
dc.contributor.authorGrandini, Carlos Roberto [UNESP]
dc.contributor.authorJurelo, A. R.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Ponta Grossa (UEPG)
dc.date.accessioned2014-05-20T13:26:13Z
dc.date.available2014-05-20T13:26:13Z
dc.date.issued2009-09-25
dc.description.abstractThe discovery of the spatial uniform coexistence of superconductivity and ferromagnetism in ruthenocuprates, RuSr2GdCu2O8 (Ru-1212), has spurred an extraordinary development in the study of the competition between magnetism and superconductivity. However, several points of their preparation process and characterization that determine their superconductive behaviour are still obscure. The improvement of sample preparation conditions involves some thermal treatments in inert atmosphere. Anelastic spectroscopy measurements were made using an inverted torsion pendulum, operating with an oscillation frequency of 38 Hz, temperature in the 90 and 310 K range, heating rate of 1 K/min, and vacuum better than 10(-3) Pa. The results show anelastic relaxation peaks at 210 K related to the presence of interstitial oxygen atoms. The peaks decrease significantly with the oxygen loss caused by the heat treatments in vacuum, appearing again after the annealing of the sample in an oxygen atmosphere. These observed peaks are clearly related to the additional oxygen atoms, with activation energy 0.13 and 0.36 eV, and can be explained in terms by diffusional jumps of interstitial oxygen in the RuO2 planes. (C) 2009 Elsevier B.V. All rights reserved.en
dc.description.affiliationUNESP, Grp Relaxacoes Anelast, BR-17033360 Bauru, SP, Brazil
dc.description.affiliationUEPG, Lab Mat Supercond, BR-84030900 Ponta Grossa, PR, Brazil
dc.description.affiliationUnespUNESP, Grp Relaxacoes Anelast, BR-17033360 Bauru, SP, Brazil
dc.format.extent84-86
dc.identifierhttp://dx.doi.org/10.1016/j.msea.2008.09.124
dc.identifier.citationMaterials Science and Engineering A-structural Materials Properties Microstructure and Processing. Lausanne: Elsevier B.V. Sa, v. 521-22, p. 84-86, 2009.
dc.identifier.doi10.1016/j.msea.2008.09.124
dc.identifier.issn0921-5093
dc.identifier.lattes2949983867418338
dc.identifier.orcid0000-0002-3336-309X
dc.identifier.urihttp://hdl.handle.net/11449/8422
dc.identifier.wosWOS:000270330700020
dc.language.isoeng
dc.publisherElsevier B.V. Sa
dc.relation.ispartofMaterials Science and Engineering A: Structural Materials Properties Microstructure and Processing
dc.relation.ispartofjcr3.414
dc.relation.ispartofsjr1,694
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectAnelastic spectroscopyen
dc.subjectRu-1212en
dc.subjectTorsion pendulumen
dc.subjectOxygen mobilityen
dc.titleStudy of interstitial oxygen mobility in RuSr2GdCu2O8 by internal frictionen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V. Sa
unesp.author.lattes2949983867418338[2]
unesp.author.orcid0000-0002-3336-309X[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt

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