论文标题
高速抗铁磁旋转波的长途传播
Long-distance propagation of high-velocity antiferromagnetic spin waves
论文作者
论文摘要
我们报告了抗铁磁（AFM）旋转波（$ \ sim $ 10 $ 10 $ $ m）在室温下的连贯繁殖（$ \ sim $ 10 $ $ m），在倾斜的AFM $α$ -FE $ -FE $ _2 $ _2 $ _3 $与Dzyaloshinskii-Moriya互动（DMI）。前所未有的高组速度（高达22.5 km/s）的特征是使用全电动自旋波光谱法进行微波传递。在存在DMI的情况下，我们得出了分析性的AFM自旋波散，这是我们的实验结果。通过大波形纳米纳米共面波导激发的AFM自旋波进入交换方案，并遵循准线性分散关系。实验数据与我们的理论模型的拟合产生的AFM交换刚度长度为1.7 Angstrom。我们的结果为AFM旋转动力学提供了关键的见解，并展示了AFM镁化学的高速功能。
We report on coherent propagation of antiferromagnetic (AFM) spin waves over a long distance ($\sim$10 $μ$m) at room temperature in a canted AFM $α$-Fe$_2$O$_3$ with the Dzyaloshinskii-Moriya interaction (DMI). Unprecedented high group velocities (up to 22.5 km/s) are characterized by microwave transmission using all-electrical spin wave spectroscopy. We derive analytically AFM spin-wave dispersion in the presence of the DMI which accounts for our experimental results. The AFM spin waves excited by nanometric coplanar waveguides with large wavevectors enter the exchange regime and follow a quasi-linear dispersion relation. Fitting of experimental data with our theoretical model yields an AFM exchange stiffness length of 1.7 angstrom. Our results provide key insights on AFM spin dynamics and demonstrate high-speed functionality for AFM magnonics.
