Hydrothermal synthesis, crystal structure, and superconductivity of a double-perovskite Bi oxide

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dc.contributor.authorRubel, MHKen_AU
dc.contributor.authorTakei, Ten_AU
dc.contributor.authorKumada, Nen_AU
dc.contributor.authorAli, MMen_AU
dc.contributor.authorMiura, Aen_AU
dc.contributor.authorTadanaga, Ken_AU
dc.contributor.authorOka, Ken_AU
dc.contributor.authorAzuma, Men_AU
dc.contributor.authorYashima, Men_AU
dc.contributor.authorFujii, Ken_AU
dc.contributor.authorMagome, Een_AU
dc.contributor.authorMoriyoshi, Cen_AU
dc.contributor.authorKuroiwa, Yen_AU
dc.contributor.authorHester, JRen_AU
dc.contributor.authorAvdeev, Men_AU
dc.date.accessioned2021-09-14T00:00:11Zen_AU
dc.date.available2021-09-14T00:00:11Zen_AU
dc.date.issued2015-12-23en_AU
dc.date.statistics2021-09-07en_AU
dc.description.abstractDouble-perovskite Bi oxides are a new series of superconducting materials, and their crystal structure and superconducting properties are under investigation. In this paper, we describe the synthesis and characterization of a new double-perovskite material that has an increased superconductive transition temperature of 31.5 K. The structure of the material was examined using powder neutron diffraction (ND), synchrotron X-ray diffraction (SXRD), and transmission electron microscopy (TEM). Rietveld refinement of the sample based on ND and SXRD data confirmed an A-site-ordered (K1.00)(Ba1.00)3(Bi0.89Na0.11)4O12 double-perovskite-type structure with the space group Im3̅m (No. 229). This structural analysis revealed the incorporation of Na with Bi in the structure and a bent bond between (Na, Bi)–O–(Na, Bi). TEM analyses also confirmed a cubic double-perovskite structure. This hydrothermally synthesized compound exhibited a large shielding volume fraction, exceeding 100%, with onset of superconductivity at ∼31.5 K. Its electrical resistivity dropped near onset at ∼28 K, and zero resistivity was confirmed below 13 K. The calculated band structure revealed that the metallicity of the compound and the flatness of the conduction bands near the Fermi level (EF) are important for the appearance of superconductivity. © 2015 American Chemical Societyen_AU
dc.identifier.citationRubel, M. H. K., Takei, T., Kumada, N., Ali, M. M., Miura, A., Tadanaga, K., Oka, K., Azuma, M., Yashima, M., Fujii, K., Magome, E., Moriyoshi, C., Kuroiwa, Y., Hester, J. R., & Avdeev, M. (2015). Hydrothermal synthesis, crystal structure, and superconductivity of a double-perovskite Bi oxide. Chemistry of Materials, 28(2), 459–465. doi:10.1021/acs.chemmater.5b02386en_AU
dc.identifier.issn1520-5002en_AU
dc.identifier.issue2en_AU
dc.identifier.journaltitleChemistry of Materialsen_AU
dc.identifier.pagination459-465en_AU
dc.identifier.urihttps://doi.org/10.1021/acs.chemmater.5b02386en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11690en_AU
dc.identifier.volume28en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectPerovskiteen_AU
dc.subjectBismuth oxidesen_AU
dc.subjectSuperconductorsen_AU
dc.subjectTransition temperatureen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectTransmission electron microscopyen_AU
dc.subjectCrystal structureen_AU
dc.titleHydrothermal synthesis, crystal structure, and superconductivity of a double-perovskite Bi oxideen_AU
dc.typeJournal Articleen_AU
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