论文标题
基于抗铁磁域壁的混乱运动的信号检测
Signal detection based on the chaotic motion of an antiferromagnetic domain wall
论文作者
论文摘要
抗铁磁域壁动力学目前是介观磁系统中的热门话题。在这项工作中，发现，基于硫核方法，抗铁磁域壁的运动用行李式描述。数值模拟表明，抗铁磁结构域壁可以用作行李振荡器，并且可以使用周期性和混沌运动之间的过渡来检测在存在白噪声的情况下的周期信号。此外，我们计算分叉图和Lyapunov指数，以研究抗磁性结构域壁的混乱行为。数值模拟与分析解决方案非常吻合。我们的结果可能对于基于抗铁磁域壁的旋转型检测设备可能很有用。
The antiferromagnetic domain wall dynamics is currently a hot topic in mesoscopic magnetic systems. In this work, it is found that, based on the Thiele approach, the motion of an antiferromagnetic domain wall is described by the Duffing equation. Numerical simulations demonstrate that the antiferromagnetic domain wall can be used as a Duffing oscillator, and the transition between the periodic and chaotic motion can be used to detect the periodic signal in the presence of the white noise. Furthermore, we calculate the bifurcation diagram and Lyapunov exponents to study the chaotic behavior of an antiferromagnetic domain wall. The numerical simulations are in good agreement with the analytical solutions. Our results may be useful for building spintronic detection devices based on antiferromagnetic domain walls.
