ABSTRACT
The electrodeposited Thallium–Barium–Calcium–Copper Oxide (TBCCO) superconductors have considerable potential in the fabrication of long-length conductors such as wires or tapes operating. The authors have electro-deposited TBCCO films from nonaqueous solution using dimethyl sulfoxide because in aqueous solution the reduction of water is kinetically more favorable than the alkaline metals, which limit the deposition of Tl, Ba, and Ca. The precursors of superconducting TBCCO films are obtained by codepositing constituent metals under constant-potential and pulsed-potential conditions, respectively. The films can be codeposited by applying either constant potential or pulse potential. The results suggest that a significant improvement in the critical current density of electrodeposited TBCCO superconductor film can be obtained when the films are deposited under pulsed-potential conditions as opposed to constant-potential conditions. The authors are investigating the effect of silver with respect to reaction conditions and nucleation and growth on TBCCO film.
