Flux motion and isotropic effects in MgB2 near the critical temperature

dc.authorid0000-0002-6250-6977
dc.authorid0000-0002-0548-4361
dc.contributor.authorOlutaş, Murat
dc.contributor.authorKılıç, Atilla
dc.contributor.authorKılıç, Kıvılcım
dc.contributor.authorAltınkök, Atılgan
dc.date.accessioned2021-06-23T19:28:56Z
dc.date.available2021-06-23T19:28:56Z
dc.date.issued2012
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractThe anisotropic behaviour of polycrystalline MgB2 was studied in details by means of angle dependent magnetovoltage measurements (V-theta curves) at the temperatures near the critical temperature T-c, where theta is the angle between the external magnetic field H and the transport current I. The measurement of V-theta curves was carried out at fixed temperatures below T-c for different values of H and I in a range of theta = -20 degrees-200 degrees. Magnetovoltage measurements (V-H curves) were performed for perpendicular and parallel orientations of H with respect to I, i.e., the V-perpendicular to-H curves for (H) over right arrow perpendicular to(I) over right arrow and V-parallel to-H curves for (H) over right arrow parallel to(I) over right arrow. The analysis of V-theta curves does not give any agreement with V (theta) similar to sin(2) (theta) or any modified angular relationship, so that the measured dissipation is nearly independent of the angle between H and I. The isotropic effects observed in MgB2 were discussed in the frame of the continuum approximation, the discrete case and the flux line cutting associated with the double critical state model derived in the literature. Finally, it is concluded that structural disorder induced isotropic effects can explain the isotropic angular dissipation observed in V-theta, I-V and V-H curves.en_US
dc.identifier.doi10.1140/epjb/e2012-30509-0
dc.identifier.issn1434-6028
dc.identifier.issn1434-6036
dc.identifier.issue11en_US
dc.identifier.urihttps://doi.org/10.1140/epjb/e2012-30509-0
dc.identifier.urihttps://hdl.handle.net/20.500.12491/7091
dc.identifier.volume85en_US
dc.identifier.wosWOS:000312205400023en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.institutionauthorOlutaş, Murat
dc.institutionauthorKılıç, Atilla
dc.institutionauthorKılıç, Kıvılcım
dc.institutionauthorAltınkök, Atılgan
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofEuropean Physical Journal Ben_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectMgB2en_US
dc.titleFlux motion and isotropic effects in MgB2 near the critical temperatureen_US
dc.typeArticleen_US

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