Highly textured thick films by a melt-annealing technique in the Bi-Sr-Ca-Cu-O system

A melt‐annealing method has been developed to deposit highly textured superconducting thick films on different substrates in the Bi‐Sr‐Ca‐Cu‐O system. As opposed to previous techniques, this method uses powder made from an extremely dense glass sample to yield very uniform and dense thick films. The x‐ray diffraction and scanning electron microscopy results indicate that the superconducting phase is strongly oriented along the c axis perpendicular to the substrate and the films are chemically uniform. Electrical transport measurements consistently show a Tc near 80 K for all samples.