SCOPF analysis of YBa2Cu3O7−δ+xCr2O3 superconductor composite

► Paraconductivity above Tc is a tool of analysing the superconducting phase. ► Unchanged Orthorhombic structure and improved oxygen ordering in the composites. ► Reduced grain size in the composites indicates the increase in strength and hardness of the samples. ► 3D fluctuation region in the mean field region is dominated in the composite samples. ► Decrease in Tc0 and increase in ΔT value signifies the degradation of intergrain weak links.