Homovalent Ho/Bi substitution effect on characteristic properties of Bi-2212 superconducting ceramics

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dc.authoridErdem, Umit/0000-0002-0480-8176
dc.contributor.authorErdem, Umit
dc.date.accessioned2025-01-21T16:41:29Z
dc.date.available2025-01-21T16:41:29Z
dc.date.issued2021
dc.departmentKırıkkale Üniversitesi
dc.description.abstractIn the current work, the effect of trivalent Ho/Bi partial replacement on the fundamental characteristic features such as the general crystallinity quality quantities, dc electrical resistivity, superconducting, degree of granularity, strength quality of intra- and inter-grain boundary couplings in the oxygen-deficit multi-layered perovskite-based Bi2.1Sr2.0Ca1.1Cu2.0Oy (Bi-2212) superconducting ceramics is examined by powder X-ray diffraction (XRD), temperature-dependent electrical resistivity (rho-T), and Archimedes water displacement methods. The polycrystalline Bi2.1-xHoxSr2.0Ca1.1Cu2.0Oy compounds are produced by the conventional ceramic method within the molecular ratio intervals 0.00 <= x <= 0.30. All the experimental findings show that the trivalent holmium (Ho3+) impurities are successfully substituted by the bismuth (Bi3+) particles in the Bi-2212 crystal system. Besides, the optimum holmium concentration for the bulk Bi-2212 superconducting ceramics is recorded to be x = 0.01. XRD results indicate that the Bi-2212 material prepared by the optimum Ho/Bi substitution possesses the maximum average crystallite size (60 nm), Bi-2223 superconducting phase volume fraction (33.48%), c-axis length (32.55 angstrom), and Lotgering index (0.48) parameters. In this respect, the best sample with particle distributions well linked each other has the maximum bulk density value of 6.04 g/cm(3) and minimum degree of granularity of 4.13%. It is obvious that the optimum (excess) Ho/Bi partial substitution supports the enhancement in the density (granular structure nature) of Bi-2212 compound. Moreover, dc electrical resistivity measurement results show that the optimum homovalent Ho/Bi partial substitution in the Bi-2212 superconducting matrix leads to increase the homogeneities in the oxidation state of superconducting grains and especially densities of active and effective electronic states (DOS) at Fermi energy level. To sum up, this study indicates that the optimum trivalent Ho/Bi partial substitution increases the usage of Bi-2212 superconducting materials in much more application fields.
dc.description.sponsorshipKrkkale University Research Fund [2020/038]
dc.description.sponsorshipThe authors would like to express their gratitude to Krkkale University Research Fund for its financial support. Project Number: 2020/038.
dc.identifier.doi10.1007/s10854-021-07236-z
dc.identifier.endpage28604
dc.identifier.issn0957-4522
dc.identifier.issn1573-482X
dc.identifier.issue24
dc.identifier.scopus2-s2.0-85117713706
dc.identifier.scopusqualityQ2
dc.identifier.startpage28587
dc.identifier.urihttps://doi.org/10.1007/s10854-021-07236-z
dc.identifier.urihttps://hdl.handle.net/20.500.12587/24895
dc.identifier.volume32
dc.identifier.wosWOS:000710609100002
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofJournal of Materials Science-Materials In Electronics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241229
dc.titleHomovalent Ho/Bi substitution effect on characteristic properties of Bi-2212 superconducting ceramics
dc.typeArticle

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