论文标题
波纹波导中的自旋波传播
Spin wave propagation in corrugated waveguides
论文作者
论文摘要
曲率引起的效果使我们能够定制具有高度自由度的磁系统的静态和动态响应。我们研究了沉积在正弦调制的底物上，通过聚焦电子束沉积制备的瓦楞岩石指导。厚度与调制幅度相当的薄膜中的表面曲率在局部修饰了偶极和交换能的贡献，并导致有效的各向异性项，可以根据确切的几何形状调整按需调节。我们通过布里鲁因光散射显微镜证明，在不存在外部磁场的情况下，旋转波在波纹波导中比平面波导中大的距离10 $ \ times $大。此外，我们分析了调制幅度对自旋波传播的影响，并得出结论，对于中等调制幅度，自旋波衰减长度不受影响。对于较大的幅度，随着调制的增加，衰减长度逐渐减小。
Curvature-induced effects allow us to tailor the static and dynamic response of a magnetic system with a high degree of freedom. We study corrugated magnonic waveguides deposited on a sinusoidally modulated substrate prepared by focused electron beam deposition. The surface curvature in films with thicknesses comparable to the amplitude of modulation locally modifies the contributions of dipolar and exchange energies and results in an effective anisotropy term which can be tuned on-demand based on the exact geometry. We show, by Brillouin light scattering microscopy, that without the presence of an external magnetic field, spin waves propagate over a distance 10$\times$larger in the corrugated waveguide than in the planar waveguide. Further, we analyze the influence of the modulation amplitude on spin-wave propagation and conclude that for moderate modulation amplitudes, the spin-wave decay length is not affected. For larger amplitudes, the decay length decreases linearly with increasing modulation.
