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Synthesis , Characterization Ac Conductivity Of Nickel Ferrite

Nickel ferrites were synthesized by employing sol gel technique at 600 0 C sintering temperature. The prepared samples were characterized by XRD for structural analysis indicates that the percentage of iron ions in B site increases, the intensity of the (222) peak increases. This indicates that the structural changes of the NiFe3O4, arise from the shifting of ions between A and B sites. The morphology was studies using SEM and found that morphology is more favorable for charge transportation in ferrites. The nickel ferrite (NiFe3O4) shows high σac conductivity due to dipole polarization. The high value of dielectric constant of the sample NiFe3O4 is because of structural changes associated with the nickel ferrite when the grain size is reduced to nanometer order.