Coherent control of precessional dynamics in thin film permalloy
Coherent control of precessional dynamics in thin film permalloy
复制标题
薄膜坡莫合金进动动力学的相干控制
DOI：
--
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
T. Silva
中科院分区：
文献类型：
--
作者：
T. Crawford;P. Kabos;T. Silva
我们演示了一种当系统带宽包括本征铁磁共振 (FMR) 时消除磁化动态中的过冲和振铃的方法。该方法采用交错步进激励来消除 FMR 振荡，同时最大化磁化响应的上升时间。二次谐波磁光克尔效应用于测量样品上局部点的磁响应。使用 Landau-Lifshitz-Gilbert 微分方程对测量的响应进行了充分建模。我们用破坏性干扰来解释观察到的行为。
We demonstrate a method of eliminating overshoot and ringing in magnetization dynamics when the system bandwidth includes the intrinsic ferromagnetic resonance (FMR). The method employs staggered step excitation for the cancellation of FMR oscillations while maximizing the risetime of the magnetization response. The second-harmonic magneto-optic Kerr effect is used to measure the magnetic response at a localized spot on the sample. The measured response is adequately modeled with the Landau–Lifshitz–Gilbert differential equation. We explain the observed behavior in terms of destructive interference.