论文标题
具有轴向和圆周磁化的纳米管中现有的自旋波的磁性旋转特性
Magnetochiral Properties of Spin Waves Existing in Nanotubes with Axial and Circumferential Magnetization
论文作者
论文摘要
我们报告了通过Brillouin光散射（BLS）光谱法的22 nm厚Ni80Fe20纳米管中的自旋波激发的实验研究。通过微波辐射，我们解决了纳米管中心的离散共振集，范围为2.5至12.5 GHz。与最新的理论工作和微磁模拟相比，我们根据轴向，混合或涡旋配置确定不同的特征算术。混合和涡旋状态产生模式，其螺旋相曲线证实了归因于非重生自旋波的模式的异常性质。我们的发现为3D纳米磁管提供了对管状自旋波纳米腔和磁性效应的微观见解。
We report experimental studies of spin-wave excitations in individual 22 nm thick Ni80Fe20 nanotubes with diameters of about 150 nm by means of Brillouin light-scattering (BLS) spectroscopy. Irradiated by microwaves we resolve sets of discrete resonances in the center of nanotubes ranging from 2.5 to 12.5 GHz. Comparing to a recent theoretical work and micromagnetic simulations, we identify different characteristic eigenmodes depending on the axial, mixed or vortex configuration. The mixed and vortex states give rise to modes with helical phase profiles substantiating an unusual nature of modes attributed to non-reciprocal spin waves. Our findings provide microscopic insight into tubular spin-wave nanocavities and magnetochiral effects for 3D nanomagnonics.
