Magnetostatic surface-wave propagation in finite samples

The dispersion relation of magnetostatic surface waves propagating in a ferromagnetic film of finite dimensions is derived. Specifically, a consideration of the finite width of the sample is introduced to the previous treatments of magnetostatic surface-wave propagation. The inclusion of a finite wi...

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Bibliographic Details
Published in:Journal of applied physics 1978-09, Vol.49 (9), p.4886-4895
Main Authors: O’Keeffe, T. W., Patterson, R. W.
Format: Article
Language:English
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Summary:The dispersion relation of magnetostatic surface waves propagating in a ferromagnetic film of finite dimensions is derived. Specifically, a consideration of the finite width of the sample is introduced to the previous treatments of magnetostatic surface-wave propagation. The inclusion of a finite width produces a multiplicity of propagating modes, which can be excited individually or collectively, depending on experimental conditions. In addition, the finite width allows the excitation of magnetostatic volume waves, which exist over a narrow frequency range just below the range of magnetostatic surface waves. All aspects of the theoretical analysis are supported by measurements made on magnetostatic surface-wave propagation at frequencies around 1 and 9 GHz in yttrium iron garnet samples of different widths.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.325522