Numerical simulations of chaotic and hyperchaotic signals measured in nonlinear magnetic resonance

Nonlinear antiferromagnetic resonance observed by the parallel pumping technique in anisotropic materials exhibits a rich temporal behavior of the absorbed microwave power. When pumped well above the instability threshold, this involves fractal dimensions up to around 5. The basic physical behavior can be described with models that account for the interaction of n excited spin-wave modes. We report on simulations based on the 2n-dimensional stroboscopic model that allows an analytic integration of the (classical) spin motion between the strobing times