Abstract
The bulk superconducting composites Cu0.5Tl0.5 Ba2−YSr Y Ca2Cu3O10−δ (Y = 0, 0.15, and 0.25) have been synthesized at an ambient pressure. The techniques used to characterize the samples were X-ray scans, Fourier transform infrared spectroscopy (FTIR), and dc resistivity (ρ) measurements. In CuTl-1223 system, we replaced Sr atom at Ba site and studied the superconducting properties of squeezed charge reservoir layer (CRL). From the XRD analysis, it is confirmed that the samples have orthorhombic structure and the dimensional parameters of the unit cell suppressed with the dopant atom which is most probably due to small in size of Sr atom as compared with Ba. The normal-state resistivity and critical temperatures, i.e., T c (R = 0) and \(T_{\mathrm {c}}^{\text {onset}}\) are observed to be suppressed. The lower values of critical temperature T c (R = 0) and activation energy U o (eV) might be possible due to a weak flux pinning. Accordingly, a reduction of weak links and enhanced insulating nature of inter-grain coupling were observed with the doping of Sr atom in CRL. Moreover, the doping in CRL of Sr atom is also confirmed with the FTIR technique. The intrinsic parameters, i.e., coherence length ξ c(0), crossover temperatures (T 3D−2D), inter-layer coupling (J), etc. were calculated by fluctuation-induced conductivity (FIC) analysis.
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Muzaffar, M.U., Hussain, G., Khan, N.A. et al. Effect of Charge Reservoir Layer on the Structural and Transport Properties of CuTlBa2−YSr Y -1223 (Y = 0 − 0.25) Superconductor. J Supercond Nov Magn 30, 2053–2058 (2017). https://doi.org/10.1007/s10948-017-4026-4
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DOI: https://doi.org/10.1007/s10948-017-4026-4