Transport relaxation measurements and glassy state effects in superconducting MgB2

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dc.authorid0000-0002-0548-4361en_US
dc.authorid0000-0002-6250-6977
dc.contributor.authorOlutaş, Murat
dc.contributor.authorYetiş, H.
dc.contributor.authorAltınkök, Atılgan
dc.contributor.authorKılıç, A.
dc.contributor.authorKılıç, K.
dc.date.accessioned2021-06-23T19:25:46Z
dc.date.available2021-06-23T19:25:46Z
dc.date.issued2008
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description20th International Symposium on Superconductivity -- NOV 05-07, 2007 -- Tsukuba, JAPANen_US
dc.description.abstractTime dependent effects in superconducting MgB2 have been studied systematically for the first time by transport relaxation measurements (V-t curves) as a function of transport current (I), temperature (T) and external magnetic field (H). At very low dissipation levels (below similar to 1 mu V), it was observed that the sample voltage grows up smoothly in time by exhibiting the details of initial stage of relaxation process. At high dissipation levels, steady state corresponding to constant flow rate is maintained within a very short time and monitoring of details of flux dynamic evolving along sample becomes difficult on long time scales. Another interesting behavior is the appearance of voltage peak when the transport current was reduced to a finite value. After peak, it was observed that the sample voltage relaxes smoothly by leveling off within a very short time. The evolution of V-t curves suggests that formation of resistive flow channels along sample develops easily, which is quite similar to that of obtained for the superconducting ceramic samples whose grain boundaries are improved. Time dependent effects were also observed in magnetovoltage measurements (V-H curves) as the field sweep rate (dH/dt) varies. The observations were interpreted mainly in terms of flux trapping in grains. (C) 2008 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipTsukuba Int Congress Ctren_US
dc.identifier.doi10.1016/j.physc.2008.05.139
dc.identifier.endpage1450en_US
dc.identifier.issn0921-4534
dc.identifier.issn1873-2143
dc.identifier.issue15-20en_US
dc.identifier.scopus2-s2.0-50349085299en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage1447en_US
dc.identifier.urihttps://doi.org/10.1016/j.physc.2008.05.139
dc.identifier.urihttps://hdl.handle.net/20.500.12491/6224
dc.identifier.volume468en_US
dc.identifier.wosWOS:000259712900093en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorOlutaş, Murat
dc.institutionauthorYetiş, H.
dc.institutionauthorAltınkök, Atılgan
dc.institutionauthorKılıç, A.
dc.institutionauthorKılıç, K.
dc.language.isoenen_US
dc.publisherElsevier B.V. Allen_US
dc.relation.ispartofPhysica C-Superconductivity And Its Applicationsen_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectFlux Pinningen_US
dc.subjectMagnetovoltageen_US
dc.subjectType-II Superconductorsen_US
dc.titleTransport relaxation measurements and glassy state effects in superconducting MgB2en_US
dc.typeConference Objecten_US

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