Effects of Zn2+ substitution on the structural, morphological, DC electrical resistivity, permeability and magnetic properties of Co0.5Cu0.5-xZnxFe2O4 nanoferrite

A strong magnet of Co0.5Cu0.5-xZnxFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5) was prepared by using the sol-gel auto-combustion technique. Using XRD, FESEM, HRTEM, FTIR, and VSM, the synthesized samples' structural and functional group, and permeability, magnetic and DC electrical resistivity properties were studied. The structure was found to be cubic spinel. The average crystallite sizes were found to be 40-60 nm. With an increase in Zn2+ ion replacement, the lattice constant increases. Field effect scanning electron microscopy (FESEM) and HRTEM are both used to examine the surface morphology and crystalline nature. Two absorption bands around 600 and 400 cm(-1) related to tetrahedral (A) and octahedral (B) interstitial sites by FTIR agree with the spinel lattice. All possible parameters are responsible for enhancing the magnetic quality identified and presented in this work. These are highly suitable for multi-layer ferrite chip inductor applications with a considerable enhancement in permeability. Magnetic properties have been explained on the basis of cation distribution. The sample's hysteresis curves showed that the saturation magnetization and coercivity decreased after Zn2+ ions were replaced in the Co-Cu nanoferrites. The ferrite samples were semiconducting because the DC electrical resistivity decreased as temperature increased.