The Influence of Skin Effect on Frequency Dependence of Dynamic Permeability in Ferromagnetic Films

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Resumo

The influence of the skin effect on the frequency dependence of the permeability of ferromagnetic films is studied. Analytical expressions for the dynamic permeability of the film are obtained in cases of weak and strong skin effect. It is shown that for a thin film, the skin effect leads to an increase in the width of the peak of the frequency dependence of the imaginary part of the permeability. In the case of a strong skin effect, the film permeability can be represented as two terms corresponding to the Lorentz frequency dispersion law. Analysis of experimental data on Fe–N films shows that the contribution of the skin effect to the frequency dependence of the permeability is small for films less than 750 nm thick.

Sobre autores

A. Osipov

Institute for Theoretical and Applied Electromagnetics, Russian Academy of Sciences

Moscow, 125412 Russia

N. Buznikov

Institute for Theoretical and Applied Electromagnetics, Russian Academy of Sciences

Email: n_buznikov@mail.ru
Moscow, 125412 Russia

I. Komarov

Institute for Theoretical and Applied Electromagnetics, Russian Academy of Sciences

Moscow, 125412 Russia

S. Maklakov

Institute for Theoretical and Applied Electromagnetics, Russian Academy of Sciences

Moscow, 125412 Russia

S. Maklakov

Institute for Theoretical and Applied Electromagnetics, Russian Academy of Sciences

Moscow, 125412 Russia

K. Rozanov

Institute for Theoretical and Applied Electromagnetics, Russian Academy of Sciences

Moscow, 125412 Russia

A. Shiryaev

Institute for Theoretical and Applied Electromagnetics, Russian Academy of Sciences

Moscow, 125412 Russia

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