Abstract
The effect of sintering in air and annealing in oxygen flow at various temperatures and times on the superconducting transition of Bi2Sr2Ca1Cu2O8 ceramic was studied. Samples sintered at 1138 K for 24 h in air and slowly-cooled to room temperature are single-phase with the highest zero resistivity temperature of 88 K. XRD pattern showed that the single-phase was characteristic of tetragonal structure witha=0.5398 nm andc=3.0620 nm. Both a.c. susceptibility and resistivity measurements give similar values for the onset (100 K) of superconducting transition.
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Naidu, B.S., Reddy, B.J., Reddy, Y.P. et al. Properties of Bi-Sr-Ca-Cu-O highT c superconductor. Bull. Mater. Sci. 14, 211–216 (1991). https://doi.org/10.1007/BF02747317
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DOI: https://doi.org/10.1007/BF02747317