Superconductivity of barium-doped Bi2Sr2CaCu2O
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| Authors: | Beifang Yang Airton Martin M J G Lee J M Perz |
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| Affiliation: | 1. Department of Physics, University of Toronto, M5S 1A7, Toronto, Ontario, Canada
3. Department of Physics and Scarborough College, University of Toronto, M5S 1A7, Toronto, Ontario, Canada
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| Abstract: | Sintered ceramic samples of Bi2Sr2?x Ba x CaCu2Oy with nominal barium fraction 0≤x≤0.3 have been prepared by the solid-state reaction method. WDS studies verified that barium enters the superconducting phase. For slowly cooled samples, the midpointT c of the superconducting transition is significantly increased by barium doping, whereas for quenched samplesT c is little affected. The increase ofT c with increasing barium fraction is consistent with a decrease in the hole concentration in the superconducting layers. |
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