Synthesis and Characterization of Fluorinated Superconducting Y3Ba5Cu8Oy Compound

The effect of fluorine addition on morphological, structural and electrical properties of superconducting samples of composition Y3Ba5Cu8Oy-xFx (x = 0.0, 0.2, 0.4 & 0.6) were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transition temperature (Tc) measurements. The samples were synthesized by solid state reaction method. The XRD of the samples revealed a structure similar to that of Y-123 compound with about three time larger ‘c’ axis. The grain size calculated was found to increase with fluorine doping as indicated by SEM micrograph. As the fluorine amount increased, the Tc onset of the superconducting phase was found to be increased. Over all, the fluorine addition had improved the superconducting property of the samples considerably.