Study of the Structural and Magnetic Properties of Nizn Ferrite Nanoparticles Synthesized by Thermal Decomposition

Abstract

Thermal decomposition was used to create Ni_1-xZn_xFe₂O₄(x = 0.6, 0.7, 0.8)  nanoparticles. It was determined that the synthesised particles were pure spinel ferrite structures and that their diameter ranged from 48 to 52 nm, depending on the composition. The particle size of the ferrite nanoparticles in the FE-SEM picture is around 50 nm, which is consistent with the result of the Scherrer equation. They have spherical forms with some mild aggregation. As the Zn concentration rose from 0.6 to 0.8, the ferrite nanoparticles' lattice parameter grew monotonically from 8.35 to 8.368. From 82.44 to 84.87 emu/g, the saturation magnetization value first progressively falls. Then, as the zinc concentration rises from x = 0.6 to 0.7 to 0.8, it rapidly drops to 72.82 emu/g. By sintering ferrite nanoparticles at 1255 °C, Ni_1-xZn_xFe₂O₄ toroidal samples were made, and regardless of the amount of zinc present, all of them showed faceted grain morphologies with grain diameters of roughly 6 m. With increasing the zinc concentration from x = 0.6 through 0.7 to 0.8, the actual magnetic permeability (μ) of the toroidal samples grew monotonically from 104 to 145 to 220. The cutoff frequency of the ferrite toroidal samples was determined to be around 20 MHz from the wide maximum point, according to the imaginary magnetic permeability (μ′) vs. frequencies plot, which looked to be connected to domain wall resonance.