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TitlePreparation of YBCO and BSCCO superconducting thin films by a new chemical precursor method
Publication TypeJournal Article
Year of Publication2005
AuthorsGunji, T., Unno M., Arimitsu K., Abe Y., Long N., and Bubendorfer A.
JournalBulletin of the Chemical Society of Japan
Pagination187 - 191
Date Published2005
ISSN00092673 (ISSN)
Keywordsarticle, barium derivative, bismuth, Calcination, calcium derivative, Ceramic products, ceramics, Chemical analysis, chemical structure, combustion, copper complex, Critical current density (superconductivity), Critical temperature, dry deposition, Epitaxial growth, Ethanol, film, material coating, Melt spinning, melting point, organic compound, Oxygen, reaction analysis, Scanning electron microscopy, Spin coating, strontium, Substrates, Superconducting films, Superconductive thin films, superconductor, temperature dependence, triethanolamine, yttrium, Yttrium barium copper oxides
AbstractHomogeneous YBa2-Cu3O7-δ (YBCO) and Bi2SrCa2Cu2O8+y (BSCCO) precursors were prepared by the reaction of triethanolamine with ethyl acetoacetato complexes of Y, Ba, and Cu and those of Bi, Sr, Ca, and Cu, respectively. These precursors showed melt-spinnability and converted to ceramics on heating with the elimination and combustion of organic groups. Superconductive thin films were prepared by depositing a solution on a substrate by spin-coating, followed by calcination. Epitaxial growth of the YBCO phase, with c axis normal to the substrate, was observed. The critical temperature was 88.7 K and the critical current density at 77 K and O T was 5 × 105 A/cm2. On the other hand, the epitaxial growth of the c axis aligned BSCCO phase was observed: the critical temperature was 77 K and the critical current density at 5 K was 6 × 104 A/cm2.

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