Observation of the modulation instability and spin wave solitons in ferromagnetic films under the conditions of coexistence of four-wave and three-wave parametric processes |
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Authors: | M. A. Cherkasski? N. G. Kovshikov B. A. Kalinikos |
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Affiliation: | 1. St. Petersburg Electrotechnical University “LETI,”, ul. Professora Popova 5, St. Petersburg, 197376, Russia
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Abstract: | Nonlinear phenomena that arise during the propagation of spin waves in thin ferromagnetic films under conditions of the simultaneous existence of three-wave and four-wave parametric processes have been investigated. Investigations have been performed for single-frequency and double-frequency regimes of excitation of intense spin waves. The spontaneous modulation instability of the monochromatic running spin wave has been revealed for the first time at frequencies at which three-wave decay processes are allowed. The pronounced generation of a periodic sequence of bright spin wave solitons has been observed under excitation of two monochromatic spin waves at the same frequencies. |
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