Calculation of the temperature dependence of the magnetization of sintered materials Pr–Dy–Fe–Co–B using molecular field approximation theory

Korolev D.V., Valeev R.A., Morgunov R.B., Piskorsky V.P.
UDC
539.231:669.859:537.622
DOI
10.18577/2307-6046-2023-0-2-42-52
Article PDF (Russian) (680.26 KB)
How to cite
Korolev D.V., Valeev R.A., Morgunov R.B., Piskorsky V.P. Calculation of the temperature dependence of the magnetization of sintered materials Pr–Dy–Fe–Co–B using molecular field approximation theory // Proceedings of VIAM. 2023. No. 2. DOI: 10.18577/2307-6046-2023-0-2-42-52. URL: https://test.viam.ru/en/journal/2023/2/4
Keywords
anisotropy field, magnetization, gyroscope, basic tetragonal phase, molecular field approximation, Brillouin function, rare earth ion, Curie temperature, squareness coefficient
Abstract

Provides a theoretical calculation of the magnetization of sintered materials Pr–Dy–Fe–Co–B and provides quantitative estimates of the dependence of magnetization on the concentration of dysprosium and cobalt. The optimal concentrations of these elements have been established, leading to the minimization of the temperature coefficient of induction. Experimental data on the dependence of magnetization on temperature are obtained. Experimental and theoretical dependences agree well with each other. This indicates the presence of predictive capabilities of the developed calculation model and allows us to hope for such a selection of concentrations of chemical elements that would make the magnetic properties of ring magnets in gyroscopes insensitive to temperature in the required operating range.

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