Synthesis, X-ray data and electrical properties measurements of Bi doped TlSr2Ca2Cu3O9-superconductor

We studied the effect of Bi- doping on the properties of Tl-based superconductors by adding different amounts of Bi(NO3)2 to the TlSr2Ca2Cu3O9-V compound. The usual solid-state reaction method has been applied under optimum conditions. The x-ray data of the sample show a tetragonal structure with a high ratio of Tl-1223 superconducting phase. Resistivities were measured at different temperatures under zero magnetic fields and the data were interpreted. The samples showed a transition temperatures at zero resistance Tc(offset) were 110 K, 115 K, 117 K and 121 K at (x = 0.0, 0.10, 0.20 and 0.30) respectively