Investigation of the Magnetic Properties of Ferrites in the CoO-NiO-ZnO Using Simplex-Lattice Design

Abstract

The article is devoted to the analysis of changes in the magnetic characteristics of ferrites in the CoO-NiO-ZnO system by the simplex method. Ferrites of Ni-Zn, Co-Zn, and Co-Ni were synthesized in the form of nanoparticles (20-40 nm) using a new method for processing contact nonequilibrium low-temperature plasma (CNP). The effect of the mutual influence of the contents of different cations on the saturation magnetization and the coercive field was investigated using the simplexlattice method. A magnetic investigation using a vibrational magnetometer shows that low magnetization values are observed for Ni-Zn ferrites and high for the entire Co-Zn and Co-Ni ferrite series. EPR spectra show that the value of the resonant field and line width corresponds to the value of magnetic saturation and is due to the arrangement of cations on sublattices.

Direct Cation–Cation Interactions Induced by Mg Dopants for Electron–Gas Behavior in α-Fe2O3

“…A large g factor of Fe 3+ varying from 4 to 8 has been reported in different compounds including ultrafine Fe 2 O 3 nanoparticles and ferrites of hard magnetism, but the line width of the corresponding EPR signals is still much smaller than that of the broad signal in these Mg-doped samples. − Such a huge valley at a low field in EPR spectra is known as conduction electron spin resonance (CESR) in two-dimensional electron gases (2DEGs). , These electrons are generally from the confined electrons inside quantum wells or at the interface between two oxides . In the Mg-doped samples, the valence electrons for Mg–Fe interactions are also confined in the Mg–Fe direction of Fe–Mg bonds, and it is reasonable for these electrons to act as an electron gas.…”

Дослідження Впливу Параметрів Синтезу На Структурні Та Магнітні Властивості Фериту Кобальта

“…The huge demand for nano-sized ferrites causes significant attention of scientists to the development of technologies for their synthesis and the study of physico-chemical properties [1][2][3]. Among the spinel ferrites, CoFe2O4 occupies a special place due to its chemical stability, high mechanical parameters, specific electrical, magnetic, and catalytic properties, which makes it possible to use the material in many fields of application [4][5][6][7][8]. Cobalt ferrite is widely used in gas sensors [9][10][11], in medicine [15][16][17], and in catalytic processes of organic synthesis [18].…”

3,4-Dihydroxiphenylacetic Acid-Based Universal Coating Technique for Magnetic Nanoparticles Stabilization for Biomedical Applications

“…Magnetic properties of nanoparticles mostly depend on the structure, size, and shape of the magnetic core [ 26 , 27 , 28 ], whereas the chemical structure of a surface coating mostly dictates its colloidal stability and plays an important role in interaction with cells and tissues in in vitro and in vivo experiments [ 9 , 29 , 30 ]. Optimization of both parameters is crucial for the increase of MNP effectiveness in biomedical applications.…”