Abstract
A theoretical model for the dynamics in a ferromagnetic thin metal film in the presence of a high-density spin-polarized direct current is presented. By considering the excitation of two spin-wave modes, it is numerically shown that the behavior of the microwave nanooscillator is in perfect analogy to that of two species competing for the same food supply, as described by the Lotka-Volterra model, or to that of a two-mode laser, as described by Lamb's theory: Only one mode will survive in the steady state.
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