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Parametric instability of spin waves in feriite magnonic crystal with defect


E.S. Pavlov - Scientific Researcher, Kotelnikov SBIRE RAS E-mail: A.V. Sadovnikov - Ph.D. (Phys.-Math.), Scientific Researcher, Saratov State University named after N.G. Chernyshevskii Yu.A. Filimonov - Dr.Sc. (Phys.-Math.), Director of Kotelnikov SBIRE RAS

The propagation of nonlinear spin waves in conditions of three- (3M) and four-magnon (4M) parametric instability in one- and two- dimensional magnonic crystal is investigated. Using by method Brillouin spectroscopy (BLS) the space-time spin-wave propagation dynamic is obtained. It was shown that in condition of 3M processed on defect modes frequency excitation observed effects of bistability and spin waves amplification. It was shown that for frequency of defect mode 3M decay hysteresis is observed by the bistability of parametric spin waves.


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