Experimental study of scaling laws for the complex susceptibility of type-II superconductors

dc.creatorde Lima, OF
dc.creatorCardoso, CA
dc.date2000
dc.dateMAY 1
dc.date2014-12-02T16:27:01Z
dc.date2015-11-26T16:33:39Z
dc.date2014-12-02T16:27:01Z
dc.date2015-11-26T16:33:39Z
dc.date.accessioned2018-03-28T23:15:37Z
dc.date.available2018-03-28T23:15:37Z
dc.identifierPhysical Review B. American Physical Soc, v. 61, n. 17, n. 11722, n. 11728, 2000.
dc.identifier1098-0121
dc.identifierWOS:000086937700087
dc.identifier10.1103/PhysRevB.61.11722
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/79963
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/79963
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/79963
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1270935
dc.descriptionMeasurements of the nonlinear complex susceptibility chi, taken as a function of amplitude h and frequency nu of the ac held, can collapse into a single universal curve if they are plotted against the scaling variable hJ(v(ref))/J(nu), where J is a shielding current density and V-ref is an arbitrary reference frequency. In this work we present chi(h,nu) data for a large range of amplitudes and frequencies, measured in two Nb samples (one single crystal and one polycrystal) and one melt-textured YBa2Cu3O7-delta sample. The predicted scaling relation is verified for several sets of data taken at different temperatures below T-c and applied magnetic fields well above the first critical field H-c1. Data taken closer to T-c revealed a useful scaling applied directly to the critical current density, evaluated from the peak positions of the imaginary component chi '. The occurrence of different regimes of collective vortex creep is also discussed for the YBa2Cu3O7-delta sample.
dc.description61
dc.description17
dc.description11722
dc.description11728
dc.languageen
dc.publisherAmerican Physical Soc
dc.publisherCollege Pk
dc.publisherEUA
dc.relationPhysical Review B
dc.relationPhys. Rev. B
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectHigh-temperature Superconductors
dc.subjectMelt-textured Yba2cu3o7-delta
dc.subjectAxial Magnetic-field
dc.subjectBa-cu-o
dc.subjectFlux-creep
dc.subjectAc Susceptibility
dc.subjectSingle-crystal
dc.subjectThin-films
dc.subjectIrreversibility
dc.subjectRelaxation
dc.titleExperimental study of scaling laws for the complex susceptibility of type-II superconductors
dc.typeArtículos de revistas


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