Yttrium effect on superconductor properties of Bi(Pb)-2223 compound

Superconducting materials have many applications. These applications are performed through developing their structural characteristics and physical properties. This study presents the correlation of superconducting properties as well as its microstructural development by substitution Yttrium in Bismuth sites with different concentrations. X-ray diffraction (XRD) investigations and electrical measurements of the samples confirmed that the substitution process strongly influence the crystallite structure of the samples and consequently electrical properties. The structural analyses showed an orthorhombic structure with two phases for compound: a high-2223 phase and a low-2212 phase. The maximum TC =123K obtained at the concentration 0.1 in optimal doping regime.