Abstract
Spinel soft ferrites are magnetic materials which form an important classification of metal oxides containing ferric ions. These materials are represented with empirical formulae M2+Fe23+O4 (where M = Mg2+, Co2+, Ni2+, Zn2+, Fe2+, Mn2+ etc.). Nanoscale particles of these soft ferrites are important for several applications such as in the design of power antenna, low noise electronic devices, high frequency, biocompatible biomedical tools, for use in eco-friendly wastewater treatment and catalysis. Ni-Zn ferrites are unique due to their properties such as high electrical resistivity, saturation magnetization and magnetic permeability. In addition, Ni-Zn ferrite nanoparticles provide a large surface to volume ratio as compared to their bulk counterparts and these materials have exceptional properties like spin coating, surface anisotropy and superparamagnetism.These properties could further be exploited to develop advance high frequency systems, necessary for defence, communication and medical applications, representing an important future innovation in the field of material science. Therefore, this review intends to provide an extensive overview on synthesis, characterization and high frequency applications of Ni-Zn nanoferrites in the last two decades.
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