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Effects of low-temperature annealing on the structure and physical properties of high-temperature superconductor Bi2Sr2CaCu2O8+δ

X-ray diffraction and electron microscopic studies of cast Bi 2 Sr 2 CaCu 2 O 8+δ ceramic samples subjected to different heat treatments in a temperature range of 400-500°C were carried out in order to evaluate the structure-related origin of anomalous behavior of its physical properties T c , ΔT c , p, and X.