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High-T c superconductive thick films in the (Bi, Pb)-Sr-Ca-Cu-O system were prepared by rapid quenching. The asquenched film was amorphouslike and after annealing at 840°C, it showed superconductivity. The high-T c phase of the film increased with the increase of the annealing time. The thick films annealed at 840°C for 300 h showed superconductivity with T c(zero)=104 K and J c=200 A/cm2 at 77 K.
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Shimomura et al. (1989) studied this question.
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