Investigation of the Magnetic and Transport Properties of YBa2Cu3O7-δ High Temperature Superconductor Doped with Graphene Oxide
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Magneto transport and magnetization are studied in graphene oxide (GO)-doped YBa2Cu3O7-δ (YBCO) high-temperature superconductor. The samples were prepared by sol-gel method with different weight percentage (0, 0.3, 0.5 wt.%) of GO. The transition temperature of GO-doped samples did not change in comparison with the pure YBCO. However, SEM images show that the GO doping reduces the grain average diameter, which results in an enhancement (up to a factor of ~ 2) of the critical current density and of the flux pinning force in the presence of different applied magnetic fields.
KeywordsYBCO high-temperature superconductor Critical current density Magnetoresistance Graphene oxide doping
Financial support was provided by Alzahra University. Also, financial support was provided by Fondo Europeo de Desarrollo Regional (FEDER)/Ministerio de Ciencia, Innovación y Universidades, Agencia Estatal de Investigación (project FIS2016-79109-P), Xunta de Galicia (grant ED431C 2018/11), Xunta de Galicia and FEDER (network ED431D 2017/06 and strategic group ED431E 2018/08), and by the CA16218 Nanocohybri COST Action (EU Framework Programme Horizon 2020).
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