Magnetic Excitations in Locally Non-Equilibrium Continuum

• Authors: A. Kabychenkov
• Languages of publication: EN

Abstracts

EN

On the basis of locally non-equilibrium thermodynamics the equation for dynamics of the magnetic moment vector is derived. For a magneto disordered continuum the spectrum of locally non-equilibrium fluctuations is determined. It is shown that the spectrum is composed of electromagnetic-spin branches, which contain energy gaps and spin-electromagnetic ones which do not. Unstable modes in diamagnets are found. The dispersion relation and frequency dependence of the damping coefficient are determined for coupled waves of the magnetic vector potential and magnetization. It is shown that there exist frequency regions of transmission and non-transmission. Frequencies of the undamped waves and constant-phase damped waves can be located in these regions.

Keywords

EN

41.20.-q

Discipline

• 41.20.-q: Applied classical electromagnetism(for submillimeter wave, microwave, and radiowave instruments and equipment, see 07.57.-c)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 123
• Issue: 4
• Pages: 695-703

Dates

published

2013-04

received

2012-03-21

(unknown)

2013-01-25

Contributors

author

A. Kabychenkov

• Fryazino Filial of V.A. Kotel'nikov Institute of Radioengineering and Electronics of RAS, Vvedensky sq. 1, Fryazino, Moscow region, 141190, Russia

References

• 1. A.G. Gurevich, G.A. Melkov, Magnetization Oscillations and Waves, CRC-Press, London 1996
• 2. A.F. Kabychenkov, Bull. Rus. Acad. Sci. Phys. 74, 1376 (2010)
• 3. A.F. Kabychenkov, Techn. Phys. 54, 1116 (2009)
• 4. S.R. de Groot, P. Mazur, Non-Equilibrium Thermodynamics, North-Holland, Amsterdam 1962
• 5. I. Gyarmati, Non-Equilibrium Thermodynamics, Springer-Verlag, Berlin 1970
• 6. L.D. Landau, E.M. Lifshits, Electrodynamics of Continuous Media, Pergamon, New York 1992
• 7. S.V. Vonsovskii, Magnetism, Wiley, 1974
• 8. A.F. Kabychenkov, in: Proc. IV Int. Symp. on Surface Waves in Solid and Layered Structures, Eds. Yu.V. Gulyaev, Zh.I. Alferov, St. Petersburg State University of Aerospace Instrumentation, St. Petersburg 1998, p. 83

Identifiers

DOI

10.12693/APhysPolA.123.695