Abstract
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.