Comparison of Graphene Oxide and Reduced Graphene Oxide Doping on YBCO For Power Applications

In this research high temperature superconductor material (YBCO) was doped with graphene oxide (GO) and reduced graphene oxide (rGO) in 0.5 % wt. and 0.7 % wt. concentrations. Resistance versus Temperature (R vs. T) measurements were carried out in field cooling (FC) and zero field cooling (ZFC) conditions. In order to determine the critical transition temperature (T-C) and observe the effect of doping on the weak-links. The increase in T-C was greater in GO doped samples compared to rGO doped samples, this is due to the increase in oxygen content in the doped samples which was confirmed by iodometric titration. The weak-link effect was improved in both GO and rGO doped samples. The reduction of the weak-link effect implies YBCO material with a higher critical current density (J(C)).