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ISSN 2542-1905 (Online)

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Vysotskii S. L., Kozhevnikov A. V., Kazakov G. T., Nikitov S. A., Filimonov Y. A. Magnetostatic surface waves parametric instability in two-dimensional (2D) magnonic crystals. Izvestiya VUZ. Applied Nonlinear Dynamics, 2007, vol. 15, iss. 3, pp. 58-73. DOI: 10.18500/0869-6632-2007-15-3-58-73

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Magnetostatic surface waves parametric instability in two-dimensional (2D) magnonic crystals

Vysotskii S. L., Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
Kozhevnikov Aleksandr Vladimirovich, Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
Kazakov Gennadij Timofeevich, Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
Nikitov Sergej Apollonovich, Kotel'nikov Institute of Radioengineering and Electronics of Russian Academy of Sciences
Filimonov Y. A., Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences

First order (three-magnon) parametric instability of magnetostatic surface waves (MSSW) was experimentally studied in two-dimensional (2D) magnonic crystals with rhombic and square lattices with lattice parameter 37–40 µm. The instability was produced by etching of holes 32 µm in diameter and 1–2 µm in depth in the 16 µm-thick yttrium iron garnet (YIG) film. It was found, that MSSW threshold powers for parametric instability development in case of 2D magnonic crystals are of the order of two times greater than analogous threshold values for starting YIG films. This effect was treated as a consequence of an increase of the spin waves relaxation rate in 2D magnonic crystals due to scattering processes. It was shown, that for moderate levels of the MSSW overcriticallity the parametric instability processes don’t destroy the forbidden band in spin wave spectra. The growing of the MSSW parametric instability threshold was observed in conditions of the MSSW effective hybridization with exchange spin waves, travelling at an angle 90◦ with respect to the bias magnetic field. 

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