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An as-deposited Y-Ba-Cu-O superconducting film of which thickness was 7 µm was prepared by a spray pyrolysis method without post-annealing procedure. This film showed T conset at 93 K and T cend at 25 K. Its surface was smoother than that of a film heat treated at 950°C after the spraying process.
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Nobumasa et al. (1988) studied this question.
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