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Theory of ferromagnetic resonances in thin wires

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Czechoslovak Journal of Physics B Aims and scope

Abstract

A phenomenological theory of ferromagnetic resonances in a ferromagnetic metallic cylinder magnetized along its axis is based on the simultaneous solution of the equation of motion and Maxwell's equations. A general relaxation term in the equation of motion is used. The boundary conditions correspond to the dynamic surface anisotropy with the preferred direction parallel to the static magnetization. It is shown that the solution yields an infinite number of resonance modes of different spatial symmetry. Formulas for the surface impedance and the relative absorption of individual modes are derived. The effect of the finite radius of the cylinder on the resonance, antiresonance and spin wave resonance behaviour is discussed.

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Authors and Affiliations

  1. Institute of Physics, Czechosl. Acad. Sci., Prague, Na Slovance 2, 180 40, Praha 8, Czechoslovakia

    L. Kraus

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  1. L. Kraus
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The author would like to thank Dr. D. Fraitová for reading the manuscript and for many valuable comments on the problem.

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Kraus, L. Theory of ferromagnetic resonances in thin wires. Czech J Phys 32, 1264–1282 (1982). https://doi.org/10.1007/BF01597425

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  • DOI: https://doi.org/10.1007/BF01597425

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