宽度调制纳米带波导中偶极交换自旋波磁振子带隙的物理起源和一般控制
Physical Origin and Generic Control of Magnonic Band Gaps of Dipole-Exchange Spin Waves in Width-Modulated-Nanostrip Waveguides
摘要：
我们报告，第一次，在一个新的平面结构的磁晶体波导，由单一的磁性材料，其中传播的偶极交换自旋波的允许和禁止带可以通过在薄膜纳米带的不同宽度的周期性调制进行操纵。通过微磁学数值计算和解析计算，发现了几个磁子宽带隙的存在的起源和控制这些带隙的数量级为10 GHz的关键参数。这一工作为GHz频率范围内的宽带自旋波滤波器的潜在应用提供了一条途径。
英文摘要：
We report, for the first time, on a novel planar structure of magnonic-crystal waveguides, made of a single magnetic material, in which the allowed and forbidden bands of propagating dipole-exchange spin-waves can be manipulated by the periodic modulation of different widths in thin-film nanostrips. The origin of the presence of several magnonic wide band gaps and the crucial parameters for controlling those band gaps of the order of ~10 GHz are found by micromagnetic numerical and analytical calculations. This work can offer a route to the potential application to broad-band spin-wave filters in the GHz frequency range.
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