Parametric phenomena in magnetic nanostripes

Abstract

Systems with a time-modulated injection of energy self-organize into patterns and solitons. Magnetic systems forced by a direct spin-polarized current and a constant external field are equivalent to parametrically driven systems. This parametric equivalence implies that both systems are described by the same model, the parametrically driven, damped nonlinear Schrödinger equation, and that they exhibit the same parametric phenomena, which includes patterns and solitons. We review here recent literature on the topic, and we investigate the case of long and narrowmagnets. This configuration reduces significantly the critical currents atwhich self-organization emerges, and it allows the formation of bound states of solitons.