Explosive dynamics and localization of wave triads in a coupled magnetoelastic system.
The dynamics of three-wave parametric coupling is considered on an example of nonequilibrium magnetostrictive medium under electromagnetic pumping. Subthreshold and supercritical mode of three-wave excitation are described analytically and simulated numerically for a triad of magnetoelastic waves. Theoretical analysis of the supercritical mode shows that space-time development of three-wave excitation in such a nonequilibrium system has the character of explosive instability and localization of "positive energy" waves.
Preobrazhensky
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Joint European Laboratory LEMAC, Institut d'Electronique, de Micro-électronique et de Nanotechnologie (IEMN-DOAE-UMR CNRS 8520), Ecole Centrale de Lille, 59651 Villeneuve d'Ascq, France.
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Pernod
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