ABSTRACT
The superconducting copper oxide system Bi-Sr-Ca-Cu-0 (BSCCO) has attracted much attention due to its high transition temperature Tc and its stability on exposure to air, compared to the Y-Ba-Cu-0 (YBCO) system. The BSCCO system has many superconducting phases with various values of Tc : examples of bulk materials are the high-Tc phase Bi2Sr2Ca2Cu30JC (2223) with Tc - 110 K and the low-7c phase Bi2Sr2CaCu20^ (2212) with 7 - 80 K. It is difficult, however, to obtain the 2223 high-7^ single-phase films. Indeed, most of the films reported so far consisted of the low-Tc 2212 phase in an as-deposited state [1-3]. In spite of intense efforts, growth techniques capable of yielding as-deposited films of 2223 with high Tc (> 90) and high critical current density, Jc, have not yet been forthcoming.
