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- W1989968994 abstract "Parametric excitation of spin-waves with high microwave power causes spin-wave instability where number of spin-waves grows exponentially with time beyond thermal level. Above the spin-wave instability threshold, auto-oscillations of magnon number which include cascade of period-doubling bifurcations, chaos, periodic window and period-halving have been experimentally observed. From experimental time-series data, return maps, fractal dimensions, positive Lyapunov exponents, phase space portraits of strange attractors and two-dimensional Poincaré sections are obtained. A theoretical model of chaos due to nonlinear four-magnon interaction under parallel pumping is given. Numerical solutions display a rich variety of periodic and chaotic trajectories. A multi-fractal structure, singularity spectrum f(α), is numerically studied for two modes model which includes a microwave cavity mode." @default.
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- W1989968994 date "1989-01-01" @default.
- W1989968994 modified "2023-09-26" @default.
- W1989968994 title "Chaos in Spin-Wave Instabilities" @default.
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- W1989968994 doi "https://doi.org/10.1143/ptps.98.400" @default.
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