Abstract
Post-annealing effects on superconducting characteristics have been studied in Bi2Sr2Ca1Cu2Ox single crystals grown by a conventional flux method. Also, favorable growth conditions and the effect of the pre-sintering process on the starting materials for flux growth have been examined. The best superconducting behavior is obtained in post-annealed crystals grown from pre-sintered powder materials. The critical current density Jc estimated from magnetization hysteresis in annealed crystals grown with pre-sintered materials is roughly 8×105 A/cm2 (H∥c) and 5×104 A/cm2 (H⊥c) at 4.2 K at zero field.
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