Journal of Radio Electronics. eISSN 1684-1719. 2024. ¹11
Full text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2024.11.13
OF SUBLATTICE MAGNETIZATIONS
IN TWO-SUBLATTICE FERRIMAGNET
WITH COMPENSATION POINT.
APPROXIMATION BY THE BRILLOUIN FUNCTION
Suslov D.A., Shavrov V.G., Shcheglov V.I.
Institute of Radio Engineering and Electronics RAS
125009, Moscow, st. Mokhovaya, 11-7, Russia
The paper was received November 19, 2014.
Abstract. An algorithm for determining the magnetization of sub-lattices of a two-lattice ferrimagnet with a compensation point is proposed. To express the analytical dependence of magnetization on temperature, an approximation by the Brillouin function is explicitly used. A scheme for determining the magnetization of sub-lattices based on the use of temperature values of four characteristic points of the lower branch of the phase diagram is presented. A system of equations is obtained that relates the parameters of characteristic points with the values of magnetization at the initial point and at the maximum point of the diagram at a temperature above compensation. By solving the above system of equations, fairly simple analytical expressions are obtained that determine the saturation magnetization values of both sub-lattices through the parameters of characteristic points of the lower branch of the phase diagram. The proposed technique is applied to the determination of the magnetization of sub-lattices in experiments to measure the total magnetization performed on films of two different compositions using a vibrating magnetometer. To verify the obtained values, a comparison was performed with the data obtained in the experiment, which showed a good coincidence of the calculated data with the experimental ones.
Key words: mixed garnet ferrite, compensation temperature, sub-lattice magnetization.
Financing: The work was carried out within the framework of the state assignment of the V.A. Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences.
Corresponding author: Suslov Dmity Alexeevich, sda_53@mail.ru
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For citation:
Suslov D.A., Shavrov V.G., Shcheglov V.I. The calculation algorithm of sublattice magnetizations in two-sublattice ferrimagnet with compensation point. Approximation by the Brillouin function // Journal of Radio Electronics. – 2024. ¹. 11. https://doi.org/10.30898/1684-1719.2024.11.13 (In Russian)