Determination of optimum diffusion annealing temperature for Au surface-layered Bi-2212 ceramics and dependence of transition temperatures on disorders

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dc.authorid0000-0002-5177-3703
dc.contributor.authorYıldırım, Gürcan
dc.date.accessioned2021-06-23T19:48:57Z
dc.date.available2021-06-23T19:48:57Z
dc.date.issued2017
dc.departmentBAİBÜ, Mühendislik Fakültesi, Makine Mühendisliği Bölümüen_US
dc.description.abstractThis study aims not only to declare experimentally the effect of diffusion annealing temperature (600 degrees C-850 degrees C) on the crystal structure, electrical and superconducting properties of Au surface-layered Bi-2212 ceramics by dc resistivity and powder X-ray diffraction measurements, but also to advance in-depth understanding of empirical relationship between the disorders and transition temperatures. It is found that the diffusion annealing temperature of 800 degrees C is found to be optimum for the improvement of crystal structure due to the retrogression of disorders and local structural-distortions in the layers, increasing metastability, sigma-gap anisotropy and softening of Ag and B1g phonons. Accordingly, the Au nanoparticles transit from inherently over-doped nature of the compound to optimally-doped state. Additionally, the empirical relations between critical temperatures and Delta rho parameters (related to disorders) show that it is possible to achieve maximum onset and offset critical temperature values of 90.467 K and 90.359 K for the Bi-2212 ceramics. (C) 2016 Elsevier B.V. All rights reserved.en_US
dc.identifier.doi10.1016/j.jallcom.2016.12.370
dc.identifier.endpage255en_US
dc.identifier.issn0925-8388
dc.identifier.issn1873-4669
dc.identifier.scopus2-s2.0-85008388740en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage247en_US
dc.identifier.urihttps://doi.org/10.1016/j.jallcom.2016.12.370
dc.identifier.urihttps://hdl.handle.net/20.500.12491/9276
dc.identifier.volume699en_US
dc.identifier.wosWOS:000393727500035en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorYıldırım, Gürcan
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofJournal Of Alloys And Compoundsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBi-2212 Ceramicen_US
dc.subjectDiffusion Mechanismen_US
dc.subjectTemperature-Dependenten_US
dc.subjectStructural Disorderen_US
dc.titleDetermination of optimum diffusion annealing temperature for Au surface-layered Bi-2212 ceramics and dependence of transition temperatures on disordersen_US
dc.typeArticleen_US

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