Time-dependent diffusion coefficient of Fe in MgB2 superconductors

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dc.authorid0000-0003-3183-7017en_US
dc.authorid0000-0002-7112-5607en_US
dc.contributor.authorÜlgen, Asaf Tolga
dc.contributor.authorBelenli, İbrahim
dc.date.accessioned2021-06-23T19:45:05Z
dc.date.available2021-06-23T19:45:05Z
dc.date.issued2017
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractThe iron (Fe) diffusion in superconducting MgB2 bulk samples has been studied for sintering time durations of 15 min, 30 min, 1 h, 2 h, and 4 h at 900(ay)C. Fe coating bulk polycrstalline superconducting MgB2 samples for Fe coating were prepared by pelletizing and used in the diffusion experiments with initial sintering at 800(ay)C for 1 h. A thin layer of Fe was coated on MgB2 pellets by evaporation in vacuum. Effects of Fe diffusion on the structural, electrical, and superconducting properties of MgB2 have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (IR), energy-dispersive X-ray spectroscopy (EDS), and resistivity measurements. Fe diffused samples have slightly increased critical transition temperatures and have larger lattice parameter c values, in comparison with bare samples. Fe diffusion coefficients were calculated from depth profiles of c parameter and room temperature resistivity values. Depth profiles were obtained by successive removal of thin layers from Fe diffused surfaces of the samples. Our results have shown that the Fe diffusion coefficient decreases with increasing sintering time and resistivity measurements can be utilized for determination of diffusion coefficient.en_US
dc.identifier.doi10.1007/s10948-017-4113-6
dc.identifier.endpage3375en_US
dc.identifier.issn1557-1939
dc.identifier.issn1557-1947
dc.identifier.issue12en_US
dc.identifier.scopus2-s2.0-85019191482en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage3367en_US
dc.identifier.urihttps://doi.org/10.1007/s10948-017-4113-6
dc.identifier.urihttps://hdl.handle.net/20.500.12491/9095
dc.identifier.volume30en_US
dc.identifier.wosWOS:000415284200006en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorBelenli, İbrahim
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.subjectSuperconducting Materialsen_US
dc.subjectMagnesium Diborideen_US
dc.subjectFe-Diffusion and Diffusion Coefficienten_US
dc.titleTime-dependent diffusion coefficient of Fe in MgB2 superconductorsen_US
dc.typeArticleen_US

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