dc.contributor.author | Gürsul, Mehmet | |
dc.contributor.author | Ergin, I. | |
dc.contributor.author | Özçelik, Can | |
dc.contributor.author | Depci, Tolga | |
dc.contributor.author | Özçelik, Bekir | |
dc.contributor.author | Madre, María Antonieta | |
dc.contributor.author | Sotelo, Andrés E. | |
dc.date.accessioned | 2021-07-01T07:05:20Z | |
dc.date.available | 2021-07-01T07:05:20Z | |
dc.date.issued | 2021 | en_US |
dc.identifier.citation | Gürsul, M., Ergin, I., Özçelik, C., Depci, T., Özçelik, B., Madre, M.A., Sotelo, A. (2021). Significant enhancement of superconducting performances of Bi-2212 fibers through combined sodium substitution and LFZ process. Journal of Materials Science: Materials in Electronics.
https://doi.org/10.1007/s10854-021-06305-7 | en_US |
dc.identifier.uri | https://doi.org/10.1007/s10854-021-06305-7 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12508/1800 | |
dc.description.abstract | This paper reports the microstructure, magnetoresistivity, electrical and superconducting properties of Bi-2212 fibers with Na+ ions incorporated into a superconducting matrix prepared by a polymer solution method and additionally textured through the laser floating zone process. XRD patterns showed that Bi-2212 phase is the major one with mostly (00l) diffractions due to the grain alignment, independently of Na content. SEM micrographs showed that samples are composed of well-stacked and oriented grains. The irreversibility field (H-irr), upper critical magnetic field (H-c2), coherence length (xi), and activation energies (U) have been calculated using magnetoresistivity measurements and explained based on the thermally activated flux flow (TAFF) model. Considering the resistivity-temperature graph for zero field, T-c values tend to increase from 84.8 K (for the pure sample) to 93.2 K (for 0.075Na sample), slightly decreasing for higher content. Besides, transition temperature width (Delta T-c = T-c(onset) - T-c(offset)) decreases with the increment in the Na content and reaches its minimum value (Delta T-c = 3.7 K) in 0.075Na sample. However, broadening of superconducting transition has been observed with applied field and T-c values decreased to 76.1 K for the pure sample and 86.8 K for 0.075Na sample. Likewise, the activation energies of the samples also decreases significantly with the increase of the magnetic field and the activation energies of the Na-containing samples are found to be higher than the pure sample at each magnetic field value. H-c2(0) values are calculated as 33.8, 43.8, 50.1, 33.1, and 21.4 T for 0.0, 0.075, 0.10, and 0.20 T Na samples, respectively. As a consequence, referring to all experimental results and theoretical findings, the superconducting characteristics improve regularly with Na-doping until x = 0.075 due to increment in the interaction of superconducting clusters, decrement in weak-links and stabilization of charge carriers in CuO2 conducting planes. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Springer | en_US |
dc.relation.isversionof | 10.1007/s10854-021-06305-7 | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.subject.classification | Engineering, Electrical & Electronic | |
dc.subject.classification | Materials Science, Multidisciplinary | |
dc.subject.classification | Physics, Applied | |
dc.subject.classification | Physics, Condensed Matter | |
dc.subject.classification | Solid State Reactions | |
dc.subject.classification | Superconductor | |
dc.subject.classification | Microhardness | |
dc.subject.other | Critical-current density | |
dc.subject.other | 2D pancake vortices | |
dc.subject.other | Laser floating-zone | |
dc.subject.other | Flux-creep | |
dc.subject.other | Bi | |
dc.subject.other | Growth | |
dc.subject.other | Phase | |
dc.subject.other | Magnetoresistivity | |
dc.subject.other | Microstructure | |
dc.subject.other | Activation energy | |
dc.subject.other | Bismuth metallography; | en_US |
dc.subject.other | Carrier mobility | |
dc.subject.other | Copper oxides | |
dc.subject.other | Magnetic fields | |
dc.subject.other | Sodium | |
dc.subject.other | Superconducting transition temperature | |
dc.subject.other | Technetium | |
dc.subject.other | Textures | |
dc.subject.other | Irreversibility fields | |
dc.subject.other | Laser floating zone | |
dc.subject.other | Superconducting matrix | |
dc.subject.other | Superconducting performance | |
dc.subject.other | Superconducting properties | |
dc.subject.other | Superconducting transitions | |
dc.subject.other | Thermally activated | |
dc.subject.other | Upper critical magnetic fields | |
dc.subject.other | Sodium metallography | |
dc.title | Significant enhancement of superconducting performances of Bi-2212 fibers through combined sodium substitution and LFZ process | en_US |
dc.type | article | en_US |
dc.relation.journal | Journal of Materials Science: Materials in Electronics | en_US |
dc.contributor.department | Mühendislik ve Doğa Bilimleri Fakültesi -- Petrol ve Doğalgaz Mühendisliği Bölümü | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
dc.contributor.isteauthor | Özçelik, Can | |
dc.contributor.isteauthor | Depci, Tolga | |
dc.relation.index | Web of Science - Scopus | en_US |
dc.relation.index | Web of Science Core Collection - Science Citation Index Expanded | |