Abstract
Temperature dependences of the effective magnetic anisotropy field and ferromagnetic resonance linewidth in samples of isotropic and anisotropic hexaferrite SrFe11.2Al0.1Si0.15Ca0.15O19 and anisotropic hexaferrite BaFe10.4Al1.4Si0.15Mn0.1O19, obtained by ceramic technology with wet blanks pressed in the magnetic field of 10 kOe, were studied in the frequency range from 25 to 67 GHz. The studies were carried out at temperatures from 25 to 85°C. The change in the magnetic anisotropy in this temperature range was found to be 9.8 Oe/°C for barium hexaferrite and 4.2 Oe/°C for strontium hexaferrite; the change in the ferromagnetic resonance linewidth was 12.2 Oe/°C for barium hexaferrite and 10–12.3 Oe/°C for strontium hexaferrite.
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REFERENCES
L. M. Letyuk, V. G. Kostishin, and A. V. Gonchar, Technology of Ferrite Materials of Magnetoelectronics (MISiS, Moscow, 2005) [in Russian].
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Funding
The work was conducted within a contract between the Ministry of Education and Science of the Russian Federation and the University MISIS on subsidy no. 14.575.21.0030 issued on June 27, 2014 (RFMEFI57514X0030), under the auspices of the Hexaferrite theme of applied scientific researches at the Research and Production Corporation Istok, and also was supported by a grant of the President of the Russian Federation no. MK-1041.2017.8.
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Translated by S. Efimov
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Shcherbakov, S.V., Nalogin, A.G., Kostishin, V.G. et al. Temperature Dependence of the Effective Magnetic Anisotropy Field and Ferromagnetic Resonance Linewidth in Polycrystalline Complex Substituted Magnetically Uniaxial Hexagonal Ferrites in the Frequency Range of 25–67 GHz. Tech. Phys. 65, 749–753 (2020). https://doi.org/10.1134/S1063784220050230
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DOI: https://doi.org/10.1134/S1063784220050230