By extending the current understanding and use of magnonics beyond conventional planar systems, we demonstrate the surface localization of ferromagnetic resonance (FMR) modes through the design of complex three-dimensional nanostructures. Using micromagnetic simulations, we systematically investigate woodpile-like scaffolds and gyroids — periodic chiral entities characterized by their triple junctions. The study highlights the critical role of demagnetizing fields and exchange energy in determining the FMR responses of 3D nanosystems, especially the strongly asymmetric distribution of the spin-wave mode over the system’s height. Importantly, the top–bottom dynamic switching of the surface mode localization across the structures in response to changes in magnetic field orientation provides a new method for controlling magnetization dynamics. The results demonstrate the critical role of the geometric features in dictating the dynamic magnetic behavior of three-dimensional nanostructures, paving the way for both experimental exploration and practical advances in 3D magnonics.

中文翻译：

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3D 纳米结构中铁磁共振模式的磁场控制表面定位


通过将当前对磁振子的理解和使用扩展到传统平面系统之外，我们通过复杂的三维纳米结构的设计证明了铁磁共振 （FMR） 模式的表面定位。使用微磁模拟，我们系统地研究了木堆状支架和陀螺仪——以三重结为特征的周期性手性实体。该研究强调了退磁场和交换能量在确定 3D 纳米系统的 FMR 响应中的关键作用，尤其是自旋波模式在系统高度上的强烈不对称分布。重要的是，响应磁场方向变化而跨结构的表面模式定位的自上而下动态切换为控制磁化动力学提供了一种新方法。结果表明，几何特征在决定三维纳米结构的动态磁行为方面发挥着关键作用，为 3D 磁振子的实验探索和实际进展铺平了道路。