**5. Outlook**

The synthesis of ZnCu NPs among the soft ferrites with high saturation magnetization, low retentivity, low coercivity, high initial permeability, narrow size distribution, attracted scholars towards the fabrication of these ferrites. Co-precipitation is the most suitable strategy to obtain fine crystalline size among all the techniques. The XRD pattern of the ZnCu ferrites has characteristic peaks, reveals the cubic spinel phase having an Fd3m phase group. The shape of the prepared ferrite is nearly spherical but some distortion may be observed after doping. FTIR spectra confirmed the spinel phase of the ferrite nanoparticles having tetrahedral and octahedral sites. ZnCu ferrites have a lot of applications in the field of biomedicine, electronics, and for making ferrofluids, etc. To enhance the application of ZnCu ferrite nanoparticles, continuous and effective studies are required. The electrical and magnetic properties of ZnCu ferrites can be improved by doping with other functional metals such as cobalt, zinc, copper, and can be tested for agricultural and electrical applications. The nanoparticles during the pandemic outbreaks, like COVID-19, can play a significant role in the development of high contrast imaging dyes for viral strains in body fluids. ZnCuFe can also be preferred for developing nanomaterial-based medicines and therapeutics to serve the human community.
