Superconducting Bi-Ca-Sr-Cu-O and Bi-Pb-Ca-Sr-Cu-O films were grown in situ by excimer laser ablation from pressed powder and sintered superconducting targets, respectively. The substrate temperature during deposition was found to be important to obtain a maximum transition temperature. Both 110 and 80 K superconducting phases were obtained in films with a zero resistance at 74 K.
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Ivanov et al. (1989) studied this question.
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