STUDY OF THE STRUCTURAL AND ELECTRICAL EFFECTS OF THE T2−XAGXBA2CA2CU3O10+ SUPERCONDUCTING WITH PARTIAL REPLACEMENT OF SILVER WITH THALLIUM
In this manuscript, the partial substitution of thallium by silver and its effect on the superconducting properties of T2−xAgxBa2Ca2Cu3O10+ is studied with x = 0, 0.15 and 0.25. The samples were prepared by the solid state reaction method. The electrical conductivity was examined using the four probes technique to determine the critical temperature Tc. It was found that increasing the proportions of silver for all produced samples increases the critical temperature. It was also found that the best compensation ratio for x is 0.25, which gives the highest critical temperature, Tc. The ultrastructural properties of the samples were studied using X-ray diffraction. X-ray diffraction study showed that all the prepared samples had a tetragonal structure, with a clear change in the lattice constants. The results also showed that the samples were clearly affected by the replacement of silver with thallium. It was shown that the partial replacement of Tl with Ag promoted the formation of the superconducting 2223 phase.
Keywords: Thallium, Silver, Superconducting Properties, Solid State Reaction Method, Electrical Conductivity And Tetragonal Structure.