Comparative study of hot and cold press and their effect on superconducting properties of coronene added bulk MgB2

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dc.authoridERDEM, Ozge/0000-0003-4542-941X
dc.contributor.authorErdem, O.
dc.date.accessioned2024-10-04T18:49:23Z
dc.date.available2024-10-04T18:49:23Z
dc.date.issued2019
dc.departmentBayburt Üniversitesien_US
dc.description.abstractIn this study, the superconducting properties of 4 wt% coronene (C24H12) added polycrystalline bulk MgB2 samples prepared by hot pressing and cold pressing, were reported in detail. The results were compared to determine one of which pressing methods is more useful to substitute of carbon released from C24H12 into MgB2 structure and to increase the superconducting properties of MgB2. The lattice strain, crystallite size, residual resistivity, superconducting transition temperature (T-c), critical current density (J(c)), flux pinning force density (F-p) and vertical/lateral levitation force (F-z,F-x) were analysed for the hot and cold pressed samples. The a-lattice parameter and T-c value reduced sharply for 4 wt% C(24)H(12)added cold pressed sample, resulting in a notable decrease of increment ratio of J(c) and F-p values, while the depressing of T-c is lower for 4 wt% C24H12 added hot pressed sample. The cold pressing strongly increased the lattice strain, confirming more C substitution, while the hot pressing ensured smaller crystallite size. The J(c) and F-p values were respectively found as 4.6 x 10(3) A/cm(2), 1.3 x 10(4) A/cm(2), 5.8 x 10(3) A/cm(2) and 1.8 x 10(8) N/m(3), 5.1 x 10(8) N/m(3), 2.3 x 10(8) N/m(3) for the pure sample and, 4 wt% C24H12 added hot and cold pressed samples at 20 K, 4 T. The maximum repulsive and attractive levitation force values at 20 K in ZFC and FC regimes were obtained for the 4 wt% C24H12 added hot pressed sample. Finally, the hot pressing provides an effective way to substitute C into MgB2 lattice without a remarkable decrease of T-c value, ensuring more homogenous and compacted structure, more electron-phonon interaction and strong flux pinning force.en_US
dc.description.sponsorshipScientific Research Coordination Found of Bayburt University [2015/2-03]; Scientific and Technological Research Council of Turkey (TUBITAK) [110T622]en_US
dc.description.sponsorshipThe author would like to thank S. Celik and S.B. Guner for the technical assistance during the levitation force measurements. This study was supported by the Scientific Research Coordination Found of Bayburt University, with project no.: 2015/2-03. Sample production was carried out at Karadeniz Technical University, Trabzon, Turkey. Magnetic levitation force measurements were taken at Solid State Research Laboratory in Recep Tayyip Erdogan University by using the Magnetic Levitation Force Measurement System which was designed by the project supported by the Scientific and Technological Research Council of Turkey (TUBITAK) with contract number 110T622.en_US
dc.identifier.doi10.1016/j.physc.2019.1353508
dc.identifier.issn0921-4534
dc.identifier.issn1873-2143
dc.identifier.scopus2-s2.0-85070198177en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1016/j.physc.2019.1353508
dc.identifier.urihttp://hdl.handle.net/20.500.12403/3093
dc.identifier.volume565en_US
dc.identifier.wosWOS:000489690700001en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofPhysica C-Superconductivity and Its Applicationsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectSuperconductivityen_US
dc.subjectMgB2en_US
dc.subjectCoronene addingen_US
dc.subjectHot pressen_US
dc.subjectCold pressen_US
dc.titleComparative study of hot and cold press and their effect on superconducting properties of coronene added bulk MgB2en_US
dc.typeArticleen_US

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