Abstract
We investigated the AC electrical response of MgFe2O4-Nb2O5 nanocomposite. A simple auto-combustion approach was used to synthesize MgFe2O4. The nanocomposite made of MgFe2O4-Nb2O5 was effectively made by using a basic mechanical alloying-technique. The FTIR, XRD, SEM, and EDX methods were used for the structural characterization of elaborated nanocomposites. The dielectric studies indicate that the Nb2O5 reduces the grain resistance when doped in Mg ferrite. As compared to MgFe2O4-Nb2O5 nanocomposites, the AC conductivity for the nanocomposite MgFe2O4 and Nb2O5 increased. The polarization mechanism of conductivity is explained by permittivity and impedance spectroscopy. The increase in conductivity of nanocomposite is due to the effect of Nb2O5 on relaxation time and grain boundaries found in cole-cole plot.