论文标题
合成反铁磁铁中的磁化动力学：动力学和相互旋转泵的作用
Magnetization dynamics in synthetic antiferromagnets: Role of dynamical energy and mutual spin pumping
论文作者
论文摘要
我们使用基于矢量网络分析仪和基于电气检测到的铁电磁共振技术研究了不对称层间交换耦合的PY/RU/PY TRILAYER中的磁化动力学。在静态磁化构型的所有三个方案中都可以观察到两种不同的铁磁共振模式，即通过低场的反平行比对，在中间场处的自旋 - 弗洛普过渡，以及在高场的平行比对。通过分析层间交换和Zeeman Energies，详细解释了模式的非单调行为，并且发现仅受其动力组件的相互作用而控制。另外，在三个方案中确定了两种模式的线宽，并且线宽与外部磁场的不同行为归因于样品中引起的相互自旋泵送。有趣的是，在自旋流动过渡时，异相模式和同相模式的线宽之间的差异降低，并在反平行和平行排列的磁化状态之间逆转。
We investigate magnetization dynamics in asymmetric interlayer exchange coupled Py/Ru/Py trilayers using both vector network analyzer-based and electrically detected ferromagnetic resonance techniques. Two different ferromagnetic resonance modes, in-phase and out-of-phase, are observed across all three regimes of the static magnetization configurations, through antiparallel alignment at low fields, the spin-flop transition at intermediate fields, and parallel alignment at high fields. The nonmonotonic behavior of the modes as a function of the external field is explained in detail by analyzing the interlayer exchange and Zeeman energies and is found to be solely governed by the interplay of their dynamical components. In addition, the linewidths of both modes were determined across the three regimes and the different behaviors of the linewidths versus external magnetic field are attributed to mutual spin pumping induced in the samples. Interestingly, the difference between the linewidths of the out-of-phase and in-phase modes decreases at the spin-flop transition and is reversed between the antiparallel and parallel aligned magnetization states.
