Bragg resonances in sandwich magnonic crystals with non-identical periods
The paper reports on features of spin wave bragg resonances in a sandwich structure consisted of two magnonic crystals, separated by a dielectric layer. Magnonic crystals are ferrite YIG films with periodic system of grooves with different periods on the surface. It is shown that in such a structure...
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Published in | Journal of magnetism and magnetic materials Vol. 584; p. 171051 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
15.10.2023
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Subjects | |
Online Access | Get full text |
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Summary: | The paper reports on features of spin wave bragg resonances in a sandwich structure consisted of two magnonic crystals, separated by a dielectric layer. Magnonic crystals are ferrite YIG films with periodic system of grooves with different periods on the surface. It is shown that in such a structure the symmetry of dispersion characteristics for direct and reflected waves with respect to the Bragg number is broken. As a result, the four resonances in the sandwich structure are observed in the vicinity of the first bragg resonance of a single magnonic crystals. Resonances are formed at frequencies and wave numbers other than bragg’s one for single magnonic crystals, and depends on a ratio of crystal periods. |
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ISSN: | 0304-8853 |
DOI: | 10.1016/j.jmmm.2023.171051 |