Application of generalized Snoek's law over a finite frequency range: A case study

Generalized Snoek's law proposed in an integral form by Acher and coauthors is a useful tool for investigation of high-frequency properties of magnetic materials. This integral law referred to as Acher's law allows for evaluating the ultimate performance of RF and microwave devices which e...

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Veröffentlicht in:Journal of applied physics 2016-02, Vol.119 (7)
Hauptverfasser: Rozanov, Konstantin N., Koledintseva, Marina Y.
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description Generalized Snoek's law proposed in an integral form by Acher and coauthors is a useful tool for investigation of high-frequency properties of magnetic materials. This integral law referred to as Acher's law allows for evaluating the ultimate performance of RF and microwave devices which employ magnetic materials. It may also be helpful in obtaining useful information on the structure and morphology of the materials. The key factor in practical application of Acher's law is an opportunity to employ either measured or calculated data available over a finite frequency range. The paper uses simple calculations to check the applicability of Acher's law in cases when the frequency range is limited and the magnetic loss peak is comparatively wide and has a distorted shape. The cases of large magnetic damping, pronounced skin effect, and inhomogeneity of the material are considered. It is shown that in most cases calculation of the integral through fitting of actual magnetic frequency dispersion by the Lorentzian dispersion law results in accurate estimations of the ultimate high-frequency performance of magnetic materials.
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subjects Applied physics
Dispersion
Inhomogeneity
Integrals
Magnetic damping
Magnetic materials
Magnetic properties
Mathematical analysis
Morphology
Skin effect
title Application of generalized Snoek's law over a finite frequency range: A case study
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