Superconducting thin films of Y-Ba-Cu-O oxides were prepared by a simple technique of flash evaporation. The critical temperature T c(R=0) was 80 K in a ∼1 µm-thick film on a MgO substrate. The film showed a preferred c-axis orientation after annealing at 900°C and 600°C in oxygen.
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Hato et al. (1988) studied this question.
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