Superparamagnetism of Fe3O4–Fe3 – xTixO4 Composites: Micromagnetic Modeling
P. V. Kharitonskiia, K. G. Gareeva, A. Yu. Ralinb,*, and E. S. Sergienkoc
a Saint Petersburg Electrotechnical University “LETI,” St. Petersburg, 197022 Russia
b Far Eastern Federal University, Vladivostok, 690922 Russia
c Saint Petersburg State University, St. Petersburg, 199034 Russia
Correspondence to: *e-mail: ralin.ayu@dvfu.ru
Received 14 October, 2022
Abstract—The magnetic properties of Fe3O4–Fe3 – xTixO4 composites synthesized by various methods were simulated based on the model of an ensemble of magnetostatically interacting particles. The results are in good agreement with the hysteresis characteristics of the samples calculated earlier in the framework of the model of chemically heterogeneous two-phase particles. It is shown that the used approach is also applicable to the samples consisting mainly of superparamagnetic particles in which the saturation remanent magnetization is provided by the particles blocked due to the magnetostatic interaction.
Keywords: composites, non-stoichiometric magnetite, micromagnetic modeling, two-phase particles, magnetostatic interaction, superparamagnetism, effective spontaneous magnetization
DOI: 10.1134/S0031918X22601779