轴向和周向磁化纳米管中自旋波的磁手征性质
Magnetochiral Properties of Spin Waves Existing in Nanotubes with Axial and Circumferential Magnetization
摘要：
我们报告的自旋波激发在个别22 nm厚的Ni80Fe20纳米管的直径约为150 nm的布里渊光散射（BLS）光谱的实验研究。在微波辐射下，我们解决了在纳米管中心的离散共振集范围从2.5到12.5 GHz。与最近的理论工作和微磁模拟相比，我们确定了不同的特征本征模取决于轴向，混合或涡旋配置。的混合和涡旋状态产生的模式与螺旋形的相位分布证实了一个不寻常的性质的模式归因于非互易自旋波。我们的研究结果提供了微观洞察管状自旋波纳米腔和磁手性效应的三维纳米磁学。
英文摘要：
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.
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