(TlPbBi)-(SrBa)-Ca-Cu-O superconducting films obtained by electrodeposition process

We have performed the electrochemical method to fabricate high temperature superconducting (TlPbBi) -(SrBa)-Ca-Cu-O films. The precursors of the superconducting sample were codeposited at a periodic pulsed-potential cycle (1 second at -4V and 1 second at -1V) on a silver substrate. The variation of structure, microstructure and element were analysed by ICP and SEM techniques. The specimens were consisted predominantly of the Tl-1212 phase and have a transition temperature of 80～87 K in low magnetic field. It was showed that each grain has the stoichiometric ratio of $T1_{0.7}$Pb_$Bi_{0.3}$ $_Sr{0.1}$ $Ba_{2.4}$ $Ca_{0.2}$ $Cu_{1.2}$ $2.5/O_{x}$ by EDX analysis.sis.