Abstract
(Co0.5Zn0.5Fe2 O 4) x /Cu0.5Tl0.5Ba2Ca2Cu3 O 10−δ superconductor samples, 0.00 ≤x ≤ 0.20 wt%, were prepared using a one-step solid-state reaction technique. Lattice parameters and relative volume fraction for Cu0.5Tl0.5-1223 phase added by Co0.5Zn0.5Fe2 O 4 nanoparticles were calculated from X-ray powder diffraction (XRD) data. The surface morphology and real-elemental contents for the prepared samples were studied through scanning electron microscope (SEM) and ion beam analysis (IBA), respectively. Insignificant change was observed for both the crystal structure and stoichiometry for Cu0.5Tl0.5-1223 phase with different weight percent addition of Co0.5Zn0.5Fe2 O 4 nanoparticles. In addition, the superconductivity of these samples was investigated by the electrical resistivity and ac magnetic susceptibility measurements. Both the superconducting transition temperature T c and hole-carrier concentration Pof Cu0.5Tl0.5-1223 phase increased by adding Co0.5Zn0.5Fe2 O 4 nanoparticles up to x = 0.08 wt%.
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