Superconducting films of bismuth strontium calcium copper oxides were prepared by chemical vapor deposition at 910°C and 1 Torr on MgO substrate using a bismuth alkoxide and β-diketonate chelates of Sr, Ca and Cu as source materials. In the film with T c(zero) of 78 K, the predominant phase was Bi2(Sr, Ca)3Cu2O x with the c-axis perpendicular to the substrate.
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Yamane et al. (1988) studied this question.
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