Observation of structural, optical, electrical and magnetic properties of ternary copper-doped CeO2/GO/SrTiO3 nanocomposites

Abstract A ternary system involving copper-substituted ceria (Cu:CeO 2 ) 0.95− y (GO) (SrTiO 3 0.05 nanocomposite where the GO concentration (y) is varied between 0.15 and 0.30. The innovation of this work lies in purposeful assembly using a grinding method, which was optimized through individual fabrication Cu-doped CeO with different CuO concentrations. In first, various concentrations ( x = 0.0, 0.05, 0.1, 0.2, 0.3) first individually fabricated based on sol–gel auto-combustion strategy to optimize best ratio. XRD profiles confirm successful cubic cerium (IV) oxide glycine as fuel at an annealing temperature 400 °C for h. AC conductivity investigated both over wide frequency range (10 –1 10 7 Hz) room temperature. showed lower values doped 0.3 wt% CuO, whereas it its maximum upon doping 0.1 CuO. Interestingly, graphene oxide–doped times higher than that pure , i.e., increased from 1.7 × –6 –3 S/cm. magnetic-field dependence MS /GO/SrTiO nanocomposites systematic increase Cu 2+ ion content increased. This strengthens ferromagnetism our samples increases.