Methodological notes

On the relationship between magnetostatic wave energy and dispersion characteristics in ferrite structures

Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, pl. Vvedenskogo 1, Fryazino, Moscow Region, 141190, Russian Federation

The energy and dispersion characteristics of a dipole spin wave in a ferrite — dielectric — metal structure are calculated. An analysis of spin wave dispersion characteristics with extreme points demonstrates how fundamental relationships among the propagation constant, phase and group velocities, Poynting vector, and power flux manifest themselves when the wavenumber changes near these points. A comparison of magnetostatic approximation results with calculations using Maxwell’s equations shows the inadequacy of the magnetostatic approximation formulas currently used for calculating the Poynting vector and power flux of dipole spin waves. A correct alternative is proposed.

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Fulltext is also available at DOI: 10.3367/UFNe.0181.201103c.0293
PACS: 41.20.Gz, 41.20.Jb, 75.70.−i (all)
DOI: 10.3367/UFNe.0181.201103c.0293
Citation: Vashkovsky A V, Lock E H "On the relationship between magnetostatic wave energy and dispersion characteristics in ferrite structures" Phys. Usp. 54 281–290 (2011)
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Received: 21st, May 2010, revised: 25th, August 2010, 15th, September 2010

Оригинал: Вашковский А В, Локк Э Г «О взаимосвязи энергетических и дисперсионных характеристик магнитостатических волн в ферритовых структурах» УФН 181 293–304 (2011); DOI: 10.3367/UFNr.0181.201103c.0293

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