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High-T c superconductivity in the Bi-Sr-Ca-Cu-O system |
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| Authors: | B. C. Yang H. -C. Li X. X. Xi M. Dietrich G. Linker J. Geerk |
| Affiliation: | (1) Institut für Nukleare Festkörperphysik, Kernforschungszentrum Karlsruhe, Postfach 3640, D-7500 Karlsruhe 1, Federal Republic of Germany;(2) Institut für Technische Physik, Kernforschungszentrum Karlsruhe, Postfach 3640, D-7500 Karlsruhe 1, Federal Republic of Germany;(3) Present address: Metals, General Research Institute for Non-Ferrous, Beijing, People's Republic of China;(4) Present address: Institute of Physics, Academia Sinica, Beijing, People's Republic of China;(5) Present address: Department of Physics, Peking University, Beijing, People's Republic of China |
| Abstract: | Superconductivity with transitions near 80 K and 110 K has been observed in sintered samples of the system Bi–Ca–Sr–Cu–O. The samples were prepared from mixed powders of the oxides or carbonates of the metallic elements. It was found that the heat treatment has to be restricted to a narrow temperature range near 800 °C to obtain optimum samples with respect to superconductivity. The best samples show two transitions of equal height at 80 K and 110 K with onsets near 115 K as determined from resistivity. |
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