Flux dynamics and time dependent effects in superconducting MgB2

Basit Öğe Kaydı
dc.authorid0000-0002-0548-4361en_US
dc.authorid0000-0001-7248-8728
dc.authorid0000-0002-6250-6977
dc.contributor.authorOlutaş, Murat
dc.contributor.authorKılıç, Atilla
dc.contributor.authorKılıç, Kıvılcım
dc.contributor.authorAltınkök, Atılgan
dc.date.accessioned2021-06-23T19:29:43Z
dc.date.available2021-06-23T19:29:43Z
dc.date.issued2012
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractWe have investigated the time dependent flux motion in a polycrystalline superconducting MgB2 sample by means of current-voltage (I-V curves) and transport relaxation (V-t curves) measurements. The transport measurements were carried out as functions of temperature (T), transport current (I), and applied magnetic field (H). The time effects in the I-V curves were investigated with the help of the sweep rate of transport current (dI/dt). The I-V curves exhibit nearly reversible behavior for both slow and high current sweep rates (dI/dt) upon cycling the transport current. It was observed that the evolution of the I-V curves is nearly independent of dI/dt. The small instabilities, voltage jump, and drops appearing at low dissipation levels were interpreted as a kind of plastic flow of the vortices evolving in the form of stripe or cluster in different sizes and local fluctuations in the superconducting order parameter. It was shown that the experimental I-V curves are in good agreement with a power law behavior, V(I)similar to I (n) . The pinning potential U (0) extracted from the fitting procedure is found to be approximately independent of dI/dt. In addition to the standard procedure, a reverse procedure was employed to study how the transport current (or associated vortices) penetrates from the surface into the sample. It was found that there is no marked difference between the I-V curves obtained in the standard and reverse procedures. These results suggest that, in polycrystalline MgB2, the weak links between grains (standard procedure) and surface weak links (reverse procedure) do not have a considerable effect on the evolution of the I-V curves and also on the other transport measurements. In order to understand better the flux dynamics, the experimental results for polycrystalline MgB2 sample were compared to previous similar studies on superconducting Y1Ba2Cu3O7-x (YBCO) and Bi1.7Pb0.3Sr2Ca2Cu3O (x) (BSCCO) polycrystalline samples.en_US
dc.identifier.doi10.1007/s10948-011-1336-9
dc.identifier.endpage771en_US
dc.identifier.issn1557-1939
dc.identifier.issn1557-1947
dc.identifier.issue4en_US
dc.identifier.scopus2-s2.0-84864595239en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage753en_US
dc.identifier.urihttps://doi.org/10.1007/s10948-011-1336-9
dc.identifier.urihttps://hdl.handle.net/20.500.12491/7213
dc.identifier.volume25en_US
dc.identifier.wosWOS:000305222200006en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorOlutaş, Murat
dc.institutionauthorKılıç, Atilla
dc.institutionauthorKılıç, Kıvılcım
dc.institutionauthorAltınkök, Atılgan
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofJournal Of Superconductivity And Novel Magnetismen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectFlux Dynamicsen_US
dc.subjectMgB2en_US
dc.subjectI-V Curvesen_US
dc.subjectTransport Relaxationen_US
dc.titleFlux dynamics and time dependent effects in superconducting MgB2en_US
dc.typeArticleen_US

Dosyalar

Orijinal paket
Listeleniyor 1 - 1 / 1
Küçük Resim
İsim:
murat-olutas.pdf
Boyut:
1.27 MB
Biçim:
Adobe Portable Document Format
Açıklama:
Tam Metin/Full Text
İndir

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Fizik Bölümü Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu