Abstract
The superconductivity parameters of (Cu1−xTlx)Ba2Ca4Cu5O14−δ(CuTl-1245) samples synthesized at different temperatures has been compared. Almost all the superconductivity parameters studied in this research work are suppressed with the increase of synthesis temperature beyond 890 ○C, which may be due to defects induced by the volatility of some constituents such as thallium, oxygen deficiencies, and multiphase in the final compound. The fluctuation induced conductivity (FIC) analysis has shown a decrease in the cross-over temperature (To) as well as the mean-field critical temperature (\(T_{\mathrm{c}}^{\mathrm{mf}})\) and the shift of three- dimensional (3D) Aslamasov–Larkin (AL) regions to the lower temperature with the increase of synthesis temperature beyond 890 ○C. A direct correlation between (To), the zero temperature coherence length {ξc(0)}, the interlayer coupling strength (J), mean-field critical temperature (\(T_{\mathrm{c}}^{\mathrm{mf}})\) as well as carrier concentration has also been observed.
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