Effect of annealing and quenching on superconductivity in Pb and Sb-doped Bi2Sr2Ca2Cu3O x |
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Authors: | S V Suryanarayana Ravichandra Gundakaram B Gopala Krishna S Venkat Reddy |
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Affiliation: | (1) Department of Physics, Osmania University, 500 007 Hyderabad, India |
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Abstract: | Samples of the series Bi1·9−x Pb x Sb0·1Sr2Ca2Cu3O y withx=0, 0·1, 0·2, 0·3 and 0·4 were prepared by the solid-state route. The X-ray and d.c. electrical resistivity data on furnace-cooled and quenched samples are presented. Though the starting composition is 2223, the end products were multiphase with 4334 as the major phase. A superconducting transition withT c=100K was observed in the pure 2223 sample after quenching. The furnace-cooled samples were metallic, while samples withx=0·1, 0·2 and 0·3 were superconducting after quenching. The amount of the 4334 phase decreases with increasing Pb content. Quenching seems to be favourable for the formation of the 4334 phase. |
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Keywords: | High temperature superconductivity quenching lead and antimony doping |
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