Due to its numerous uses in a variety of fields, researchers are very interested in the study of characterization and synthesis of Mn-Ni ferrites. A group of soft magnetic materials called Mn-Ni ferrites have excellent electrical, magnetic, and optical characteristics. High coercivity, saturation magnetization, permeability, permittivity, resistivity, low power losses, and permeability values are among the characteristics of Mn-Ni ferrites. Mn-Ni ferrites are useful because of their usage in different fields. These ferrites are useful in the biomedical area, in transducers, in electronic applications, transformers, and in inductors are all made using Mn-Ni ferrites. Additionally, magnetic fluids, sensors, and biosensors utilize these ferrites.