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Explosive instability of quasi-phonon triads in antiferromagnet under frequency modulated electromagnetic field |
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| Authors: | V. Preobrazhensky O. Yevstafyev P. Pernod |
| Affiliation: | a Joint European Laboratory LEMAC, Wave Research Center, GPI RAS, 38 Vavilov str., Moscow 119991, Russia b Joint European Laboratory LEMAC, V. I. Vernadsky Taurida National University, 4,Vernadsky Avenue, Simferopol 95007, Ukraine c Joint European Laboratory LEMAC, IEMN-DOAE-UMR CNRS 8520, Univ Lille nord de France, ECLille, 59651 Villeneuve d’Ascq, France |
| Abstract: | Compensation of nonlinear frequency shift of hybrid magnetoelastic waves (quasi-phonons) in the process of parametric three-boson coupling is studied theoretically and experimentally. The singular frequency modulation of electromagnetic pumping is proposed for the observation of explosive instability of quasi-phonon triads. The explosive supercritical dynamics is simulated theoretically on the basis of strong nonlinear equations of magnetoelastic dynamics and observed in α-Fe2O3 magnetoacoustic resonator. |
| Keywords: | Magnetoelastic waves Three-boson coupling Quasi-phonon triads Explosive supercritical dynamics |
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