Impact of the Calcination Temperature on Structural, Electrical and Dielectric Properties for Mg0.6Cu0.4FeCrO4 Spinel Ferrites

During this work, we synthesize Mg0.6Cu0.4FeCrO4 powders by the sol-gel method, and then we sinter this powders prepared at two different temperatures (900 & DEG;C and 1100 & DEG;C). Structural analysis was studied by X-ray diffraction (XRD) and Rietveld refinement show a single pure phase with cubic spinel structure (Fd-3m). The behavior of constants dielectrics for both samples shows giant values for the real (& epsilon;& PRIME; & AP; 10(3) and & epsilon;& PRIME; & AP; 10(4), respectively, for s900 and s1100) and imaginary (& epsilon;& DPRIME; & AP; 10(4) and & epsilon;& PRIME; & AP; 10(6), respectively, for s900 and s1100) part of the permittivity. By analyzing the relaxation time and ac-conductivity, it was discovered that the same type of charge carriers may be responsible for both the relaxation and conduction processes.