Structure and Superconducting Properties of Cd0.8Ba2(Y0.7Ca0.4)Cu3.5Oy |
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| Authors: | N Balchev K Konstantinov B Kunev J Tihov J Pirov and V Kovachev |
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| Affiliation: | (1) Institute of Solid State Physics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria;(2) Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;(3) Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;(4) Faculty of Physics, University of Sofia, J. Baucher 5, Sofia, Bulgaria;(5) Electroheat Ltd, Botunetz District, 1870 Sofia, Bulgaria |
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| Abstract: | A new Cd-containing superconductor with nominal composition ofCd0.8Ba2(Y0.7Ca0.4)Cu3.5O
y
was synthesized and investigated. The obtained Cd and Ca-doped 123 phase exhibits an orthorhombic (T
c=80 K) or tetragonal (T
c=65 K) modification depending on the reaction atmosphere. It was shown that the combined Cd and Ca substitution facilitates the 123 phase formation. The results of the EDX analysis, as well as the comparison of the obtained lattice parameters with those of undoped, Cd-doped, and Ca-doped 123 have shown that both Cd and Ca enter the 123 phase and form a new Cd–Ba–Y–Ca–Cu–O superconducting compound. |
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| Keywords: | Cd0 8Ba2(Y0 7Ca0 4)Cu3 5O
y
superconductivity |
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