Abstract:High-temperature superconductors with a nominal composition Bi2Pb0.3Sr2Ca2Cu3-xCoxO10+ δ for (0≤x≤3) were prepared by solid-state reaction method. Effects of the Co substitution on Cu sites have been investigated to obtain the optimum concentration for the formation and stabilization of the superconducting samples. The results of electrical resistivity measurements of the samples showed that increasing x substituting Co enhance the superconducting properties except for the samples with x=3 yield semiconductor b… Show more
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