论文标题
铁磁共振的三毫克散射中的振荡和汇合
Oscillations and confluence in three-magnon scattering of ferromagnetic resonance
论文作者
论文摘要
我们已经对激发能力的几个数量级的铁磁共振（FMR）进行了三块磁通散射（FMR）的时间敏感和相敏感。我们观察到一个机制，尽管大势力较高，但仍具有FMR镁种群的瞬时振荡。同样在高力量下，散射产生了$ 180^\ circ $ circ $ phasships of FMR磁棒。这些相移对应于在分裂和汇合之间的三麦克农散射方向上的逆转。除去微波激发后，最直接观察到这些散射逆转，从而产生了FMR镁种群的相干振荡，远大于其在激发期间的稳态值。我们的模型与这些发现非常同意。这些发现揭示了这个三麦克农散射过程的瞬态行为，以及三麦克农散射与镁相之间的非平凡相互作用。
We have performed a time-resolved and phase-sensitive investigation of three-magnon scattering of ferromagnetic resonance (FMR) over several orders of magnitude in excitation power. We observe a regime that hosts transient oscillations of the FMR magnon population, despite higher-order magnon interactions at large powers. Also at high powers, the scattering generates $180^\circ$ phase shifts of the FMR magnons. These phase shifts correspond to reversals in the three-magnon scattering direction, between splitting and confluence. These scattering reversals are most directly observed after removing the microwave excitation, generating coherent oscillations of the FMR magnon population much larger than its steady-state value during the excitation. Our model is in strong agreement with these findings. These findings reveal the transient behavior of this three-magnon scattering process, and the nontrivial interplay between three-magnon scattering and the magnons' phases.
