Fluctuation Induced Conductivity in (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ Superconductor Synthesized at Different Temperatures

Abstract

The fluctuation induced conductivity (FIC) analysis of (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ superconductor synthesized at different temperatures has been carried out in the frame work of Aslamazov-Larkin (AL) theory. Almost all the superconducting parameters studied in this research work have been improved with the increase of synthesis temperature up to 850°C, which is most likely due to (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ superconducting phase stability at this synthesis temperature. The parameters calculated from FIC analysis are cross-over temperature (T0), zero temperature c-axis coherence lengths ξc(0), interlayer coupling strength (J) and the exponents (λ3D and λ2D). The FIC analysis has shown an increase in T0 and the shift of three dimensional (3D) Aslamazov-Larkin (AL) regions to the higher temperature with the increase in synthesis temperature up to 850°C.