Abstract
Preparation of Bi 2(Ln x Ca 2− x )Ca 2Cu 3O z thin films (0.3⩽ x⩽0.7, Ln=Pr, Nd, Sm, Eu and Gd) by the laser ablation method and their physical properties are described. These films have been of a metastable Bi-2223 phase, which had not been synthesized by the solid-state reaction method. In the Bi 2(Pr x Ca 2− x )Ca 2Cu 3O z system, the resistivity of Bi-2223 films has decreased with decreasing Pr content x, and the film with x=0.3 has shown the lowest resistivity. When x is fixed to 0.3 in the Bi 2(Ln x Ca 2− x )Ca 2Cu 3O z systems, the film with Ln=Sm has shown the lowest resistivity. However, the result of the resistivity and magnetic measurements have shown that none of the films is superconductive.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call