论文标题

连接的kagome人造自旋冰的顶点依赖性动态响应

Vertex Dependent Dynamic Response of a Connected Kagome Artificial Spin Ice

论文作者

Frotanpour, Ali, Woods, Justin, Farmer, Barry, Kaphle, Amrit P., DeLong, Lance

论文摘要

我们介绍了连接的kagome人造自旋冰的动态响应,重点是顶点磁化配置对模式特征的影响。我们使用宽带铁磁共振(FMR)光谱和微磁模拟来识别和表征共振模式。我们发现细长的单域膜段的模式频率不仅取决于其相对于施加的磁场的易于轴的方向,而且还取决于顶点磁化配置,这表明可以通过更改VERTEX磁化来完成对FMR模式的控制。此外,我们研究顶点中心模式(VCM)与局部域壁(LDW)模式之间的差异。我们表明,LDW模式充当域壁(DW)成核过程的签名和在段反转事件中活动性的DW动力学。结果表明,VCM和LDW模式可以使用字段协议来控制,这对Magnonic和Spintronic设备中的应用具有重要意义。

We present the dynamic response of a connected Kagome artificial spin ice with emphasis on the effect of the vertex magnetization configuration on the mode characteristics. We use broadband ferromagnetic resonance (FMR) spectroscopy and micromagnetic simulations to identify and characterize resonant modes. We find the mode frequencies of elongated, single-domain film segments not only depend on the orientation of their easy-axis with respect to the applied magnetic field, but also depend on the vertex magnetization configuration, which suggests control over the FMR mode can be accomplished by altering the vertex magnetization. Moreover, we study differences between the vertex center mode (VCM) and the localized domain wall (LDW) mode. We show that the LDW mode acts as a signature of the domain wall (DW) nucleation process and the DW dynamics active during segment reversal events. The results show the VCM and LDW modes can be controlled using a field protocol, which has important implications for applications in magnonic and spintronic devices.

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