Аннотация
Introduction. Nickel ferrite (NiFe2O4) spinel nanoparticles have attracted great interest in recent years due to their unique physicochemical properties and wide range of applications in various fields. Methodology. In this work, the synthesis of NiFe2O4 nanoparticles by the sol-gel method was studied. The synthesized NiFe2O4 nanoparticles were characterized using methods such as X-ray diffraction analysis and energy-dispersive X-ray microanalysis. Results and discussion. The results of Xray diffraction analysis showed that the main phase in the analyzed samples is iron-containing oxide of cubic structure NiFe2O4, and the position and relative intensity of the peaks correspond to the standard JCPDS No. 54–0964. Also, EDS analysis of the studied samples showed that the nanopowders consist of the elements Ni, Fe and O, which indicates the purity of the synthesized sample and the absence of any impurities. FTIR spectrum of NiFe2O4 nanoparticles showed two main peaks at 458 cm−1 and 548 cm−1 corresponding to the metal-oxygen band. Conclusion. The results of the study of the magnetic properties of the obtained NiFe2O4 nanoparticles show that the magnetic properties change depending on the alloy components and phase composition, i.e. FeNiO (77% Fe3O4 - magnetite 23% Fe0.64Ni0.36) is a particle of about 25 nm size, a multicomponent ferromagnetic powder with a predominant magnetite phase, low coercivity and relatively large saturation magnetization values. This means that they are a soft magnetic material with high magnetic properties.