Abstract
The influence of double (electrical and magnetic) nonlinearity on the Bragg resonances of the hybrid electromagnetic-spin waves in a multiferroic crystal has been theoretically and experimentally revealed. The multiferroic crystal consists of an yttrium iron garnet layer with a periodic system of grooves on the surface and a ferroelectric strontium–barium titanate layer. A dispersion relation for the hybrid waves is obtained, and the mechanism of formation of main and hybrid band gaps, namely, suppression bands, is revealed. It is shown that taking into account the magnetic nonlinearity leads to frequency rearrangement of both band gaps and taking into account the electrical nonlinearity leads to frequency rearrangement of only the hybrid band gap. In the general case, the effects of the electrical and magnetic nonlinearities on the hybrid band gap can be compensated.
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This work was supported by the Russian Science Foundation, project no. 23-79-30027.
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Translated by K. Shakhlevich
This article is prepared for the memorial issue of the journal dedicated to the 95th birthday of L.A. Prozorova.
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Morozova, M.A., Matveev, O.V., Romanenko, D.V. et al. Bragg Resonances in a Multiferroic Double-Nonlinearity Crystal. J. Exp. Theor. Phys. 137, 432–441 (2023). https://doi.org/10.1134/S1063776123100060
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DOI: https://doi.org/10.1134/S1063776123100060