论文标题
过渡状态理论是由振荡磁场驱动的薄膜大膜动力学的特征：惯性效应
Transition state theory characterizes thin film macrospin dynamics driven by an oscillatory magnetic field: Inertial effects
论文作者
论文摘要
了解铁磁薄膜中的磁化切换过程对于许多技术应用至关重要。我们研究了在明确考虑惯性动力学的情况下，通过磁场进行周期性驾驶对宏生系统的影响。这通常是通过扩展Landau-Lifshitz-Gilbert方程（包括磁化强度的第二次衍生物）来实现的。然后，磁化开关的动力学可以以其开关速率为特征。我们将过渡状态理论中的方法应用于驱动系统来解决这种一般情况下的磁化切换速率。在这样做时，我们发现磁化强度在某些驾驶条件下表现出类似共振的行为，并且可能会受到系统的放松率的强烈影响。
Understanding the magnetization switching process in ferromagnetic thin films is essential for many technological applications. We investigate the effects of periodic driving via magnetic fields on a macrospin system under explicit consideration of inertial dynamics. This is usually achieved by extending the Landau-Lifshitz-Gilbert equation with a term including the second time derivative of the magnetization. The dynamics of the magnetization switching can then be characterized by its switching rate. We apply methods from transition state theory for driven systems to resolve the rate of magnetization switching in this general case. In doing so, we find that magnetization exhibits resonance-like behavior under certain driving conditions, and it can be affected strongly by the system's relaxation rate.
