Neutron diffraction on Er1-xCaxBa2Cu3O7-delta (0.0 <= x <= 0.3) system: possible oxygen vacancies in Cu-O-2 planes

dc.creatorAwana, VPS
dc.creatorMalik, SK
dc.creatorYelon, WB
dc.creatorCardoso, CA
dc.creatorde Lima, OF
dc.creatorGupta, A
dc.creatorSedky, A
dc.creatorNarlikar, AV
dc.date2000
dc.dateAUG 15
dc.date2014-12-02T16:27:15Z
dc.date2015-11-26T16:33:51Z
dc.date2014-12-02T16:27:15Z
dc.date2015-11-26T16:33:51Z
dc.date.accessioned2018-03-28T23:15:54Z
dc.date.available2018-03-28T23:15:54Z
dc.identifierPhysica C. Elsevier Science Bv, v. 338, n. 3, n. 197, n. 204, 2000.
dc.identifier0921-4534
dc.identifierWOS:000088686600003
dc.identifier10.1016/S0921-4534(00)00308-7
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/65329
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/65329
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/65329
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1271008
dc.descriptionIn the system Er1-xCaxBa2Cu3O7-delta with x = 0.0 to 0.3, the superconducting transition temperature (T-c), as measured from AC susceptibility, decreases with increasing Ca substitution, x. Detailed analysis of the powder neutron diffraction patterns of these samples shows a decrease in oxygen content with increasing x. The orthorhombic distortion decreases slightly and the c-parameter increases slightly with increasing x. Both, the buckling angle [(Cu(2)-O(2)-Cu(2) angle)] and the planer Cu(2)-O(2) distance in Cu-O-2 planes, increase with increasing x. Increased Cu(2)-O(2) bond distance indicates a slight decrease in p-type hole carriers in Cu-O-2 planes. On comparison with reported results on T-c vs. p-type carriers in high T-c superconducting compounds, it is inferred that decrease in p-type carriers alone cannot account for sharp T-c depression with increasing n in Er1-xCaxBa2Cu3O7-delta system. With increasing x, oxygen vacancies are created in Cu-O-2 planes, which along with increased buckling angle might be partly responsible for T-c suppression in this system. (C) 2000 Elsevier Science B.V. All rights reserved.
dc.description338
dc.description3
dc.description197
dc.description204
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationPhysica C
dc.relationPhysica C
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectneutron diffraction
dc.subjectEr1-xCaxBa2Cu3O7-delta
dc.subjectoxygen vacancy
dc.subjectCuprate Superconductors
dc.subjectThermoelectric-power
dc.subjectY1-xcaxba2cu3o7-delta
dc.subjectTemperature
dc.subjectCa
dc.titleNeutron diffraction on Er1-xCaxBa2Cu3O7-delta (0.0 <= x <= 0.3) system: possible oxygen vacancies in Cu-O-2 planes
dc.typeArtículos de revistas


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