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 simplex-lattice 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.
Highlights
Oxides of composition MeFe2O4 (Me-Ni2+, Co2+, Zn2+) have important technological properties
The aim of this work is to establish the relationship between the magnetic characteristics of ferrites of the composition MeFe2O4 (Me-Ni, Co, Zn) and structural characteristics obtained by processing a contact nonequilibrium low-temperature plasma
The article is devoted to the analysis of changes in the magnetic characteristics of ferrites in the Fe2O3-CoO-ZnO system by the simplex method
Summary
Oxides of composition MeFe2O4 (Me-Ni2+, Co2+, Zn2+) have important technological properties. Ferrites of transition metals with a spinel structure are used as magnetic electrical materials [1, 2] catalysts of a number of reactions [3, 4]. Technological operations for the synthesis of such compounds require, as a rule, the use of high-temperature heat treatment and complex hardware. In this case, both traditional ceramic (from metal oxides) methods and novel technologies are used. The attention of chemists is concentrated on the development of new methods for obtaining ferrites of transition materials with a given set of properties. A characteristic trend of recent times is the development of technologies for obtaining nanodispersed ferrites
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