铁磁共振驱动的磁性纳米盘中的超混沌
Hyperchaos in a Magnetic Nanodisk Driven by Ferromagnetic Resonance
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中文总结 AI 辅助
该研究通过微磁模拟与时间序列分析，证实面外磁化纳米盘在铁磁共振非线性区域可呈现超混沌动力学，揭示其复杂性与量子化自旋波模式数量相关，确立磁子自旋电子纳米器件为非传统信息处理的多功能熵源。
中文摘要 AI 辅助
我们详细研究了面外磁化纳米盘在铁磁共振非线性区域中驱动的混沌动力学。结合广泛的微磁模拟与控制参数空间上的时间序列分析，我们绘制了从稳定周期轨道到奇异吸引子的拓扑转变并量化了动力学复杂性。尽管该纳米尺度系统结构简单，我们证实其在实验可及的控制平面广阔区域内可呈现具有多达三个正李雅普诺夫指数的超混沌动力学。利用模式投影技术，我们揭示产生的复杂性与参与动力学的量子化自旋波模式数量相关。我们的发现确立了磁子自旋电子纳米器件作为用于非传统信息处理的多功能熵源。
英文摘要
We investigate the chaotic dynamics driven in the nonlinear regime of ferromagnetic resonance of an out-of-plane magnetized nanodisk in detail. By combining extensive micromagnetic simulations with time-series analysis across the control parameter space, we map the topological transitions from stable periodic orbits to strange attractors and quantify the dynamical complexity. Despite the simplicity of our nanoscale system, we evidence that it can exhibit hyperchaotic dynamics with up to three positive Lyapunov exponents in vast regions of the control plane accessible to experimental studies. Using a mode projection technique, we unveil that the generated complexity is related to the number of quantized spin-wave modes participating in the dynamics. Our findings establish magnon-spintronic nanodevices as versatile entropy sources for unconventional processing of information.
