Abstract
The Cr3+ doped ferrite Ni0.25Cu0.2Zn0.55Fe2-xCrxO4 (x = 0.0, 0.05, 0.01, 0.15, 0.2, 0.25) were synthesized by sol–gel auto combustion method. The samples has been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and impedance analyzer. The XRD patterns reveal single phase cubic structure. The crystalline size and the lattice parameter of samples are found to be reduced with increase in Cr concentration. The SEM images show various conical shape particles for all the samples. The dielectric loss of Cr doped samples is found greater than the un-doped sample. The increase in concentration of Cr3+ ions results decrease in dielectric constant (ε′) whereas increase in AC Conductivity.
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