Effect of precursor of refinement Y211 on the superconductivity and structural of Y257 superconductor

Abstract

Y211 was added to the Y257 superconducting material at concentrations of 0, 0.10, and 0.20 mol using a solid-state reaction synthesis method. As the concentration of Y211 increased, both the onset critical temperature and the offset critical temperature decreased. The synthesized samples contained a combination of superconducting and non-superconducting compounds. The superconducting compound exhibited an orthorhombic structure with the Pmmm space group. Additionally, three different types of non-superconducting compounds were identified in the samples. The percentage of non-superconducting compounds increased with the addition of Y211. The surface morphology revealed heterogeneous elements and a random distribution of grain sizes. The samples contained Y, Ba, Cu, and O elements without any detectable impurities.