Magnetic Properties and Synthesis of Ferrites
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Abstract
Abstract
The parameters that determine practical applications oxide ferrimagnets are the values of saturation magnetizations and the magnitudes and signs of the magnetocrystalline anisotropy fields. Measuring magnetocrystalline anisotropy fields using ferromagnetic resonance (FMR) on single-crystal or textured polycrystalline hexaferrite samples is straightforward. However, these methods are not applicable for hexaferrite which typically synthesized as macroscopically magnetically isotropic polycrystalline or powder samples. This paper describes two methods to calculating the components of the permeability tensor of polycrystalline (or powder) hexaferrites in the independent grain approach. The proposed method is illustrated results of a FMR study of Y-type polycrystalline Ba2Ni2–xCuxFe12O22 (0.0 ≤ x ≤ 2.0) system, synthesized using a standard ceramic method. The measurements were performed on spherical samples in the frequency range of 37–50 GHz. The metod allows one to evaluate the magnitudes of the magnetocrystalline anisotropy fields and magnetomechanical ratios of both the target Y-phase and impurity phases. The phase composition estimates obtained from FMR data were compared with the results of X-ray phase analysis. It has been shown that up to a composition with x = 1.8, these materials are the ferroxplana-type hexaferrites. Hexaferrite Ba2Cu2Fe12O22 exhibits easy-axis type of the magnetocrystalline anisotropy.
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@article{2026Determination,
title = {Determination of Magnetocrystalline Anisotropy Fields of Magnetically Isotropic Polycrystalline Hexaferrites by the FMR Method},
author = {Виктор Алексеевич Журавлев and Dmitry V. Wagner and Olga A. Dotsenko and Katerina V. Kareva and Rustam Sh. Sayidqulov},
journal = {Compounds},
year = {2026},
doi = {10.20944/preprints202609.0973.v1},
url = {https://doi.org/10.3390/compounds6040059}
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