Enhanced Magnetic and Permeability Properties of Mn-Substituted NiCuZn Nanoparticles for Ferrite Core Application

Nanoparticles of Mn-substituted NiCuZn ferrite with an elemental composition Ni0.5−xMnxCu0.2Zn0.3Fe2O4 was synthesized by the sol–gel auto-combustion technique. Structural and electrical characteristics were analyzed by the X-ray diffraction (XRD), scanning electron microscopy, dielectric, permeability, and impedance spectroscopy measurements. Rietveld-refined XRD patterns reveal single phase with cubic symmetry of the prepared samples. The dielectric parameters such as dielectric constant and loss have been examined at room temperature and are explained in the light of Maxwell–Wagner interfacial polarization. Complex permeability analysis has been used to separate grain and grain boundary in the studied samples. Saturation magnetization, complex permeability, and dielectric constant of NiCuZn ferrite increased up to a certain level of Mn substitution. The results obtained could be of interest for the research of compositionally altered NiCuZn soft ferrites for ferrite-core application.