Nanosized ferrite is one of the new type of magnetic materials which exhibits better magnetic properties than the bulk form and therefore can be used in many fields such as chemical industries, electronic equipment, aerospace, defense, etc. Moreover, these ferrites are used in high-capacity storage devices, electromagnetic shielding, cores, magnetic separation, gas sensors, biosensors, humidity sensors, sodium ion batteries, solar cells, ferrofluilds, switching, high-frequency electromagnetic absorbing materials (EAM), drug delivery, etc. due to the potential characteristics of nanoferrites such as good magnetization, coercive field, and remanence magnetization. [1][2][3][4] In general, the spinel nanoferrites possess cubic spinel structure with two crystal lattice sites which are represented by tetrahedral (A sites) and octahedral (B sites) sites. Among spinel nanoferrites, mixed spinel nanoparticles such as NiCu, CoZn, NiCuZn, NiMg ferrites, and rare-earth (Er, Nd, La, Gd, etc.) doped ferrite nanoparticles have applications in many technological fields because of their better electromagnetic compatibility, considerable coercivity, well chemical stability, and good electromagnetic performance in the high-frequency region. [5][6][7][8][9][10] There is an increasing demand of electronic devices such as wireless communication devices, local area network (LAN) systems, computers, bluetooth technologies, high-speed data-transferring devices, and medical diagnostic tools which are operating in the microwave frequency range. [11,12] It resulted in electromagnetic interference (EMI), which is the disturbance that affects an electrical circuit of a device due to an electromagnetic radiation from another electrical circuit and signal degradation in microwavebased electric devices.