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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Bibliographic Details
Published inJournal of magnetism and magnetic materials Vol. 584; p. 171051
Main Authors Morozova, M.A., Lobanov, N.D., Matveev, O.V., Romanenko, D.V., Nikitov, S.A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.10.2023
Subjects
Bragg resonance
Magnonic crystal
Sandwich structure
Magnonic crystal
Sandwich structure
Bragg resonance
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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.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2023.171051