论文标题
非雷神dzyaloshinskii-moriya磁声波
Nonreciprocal Dzyaloshinskii-Moriya magnetoacoustic waves
论文作者
论文摘要
我们研究了超薄的COFEB/PT双层中的表面声波与自旋波的相互作用。由于界面dzyaloshinskii-moriya相互作用（DMI），旋转波分散剂对于COFEB/PT中的相对传播自旋波是非分化的。结合磁声耦合本身的附加非进型性，可以观察到高度非交流的声波传播通过磁性膜。我们系统地将磁声波传播在厚度系列的COFEB（$ D $）/pt样品中的磁性波传播是磁场幅度和方向的函数，以及最高7 GHz的频率。我们对结果进行定量建模，以提取DMI和磁声驱动场的强度。
We study the interaction of surface acoustic waves with spin waves in ultra-thin CoFeB/Pt bilayers. Due to the interfacial Dzyaloshinskii-Moriya interaction (DMI), the spin wave dispersion is non-degenerate for oppositely propagating spin waves in CoFeB/Pt. In combination with the additional nonreciprocity of the magnetoacoustic coupling itself, highly nonreciprocal acoustic wave transmission through the magnetic film is observed. We systematically characterize the magnetoacoustic wave propagation in a thickness series of CoFeB($d$)/Pt samples as a function of magnetic field magnitude and direction, and at frequencies up to 7 GHz. We quantitatively model our results to extract the strength of the DMI and magnetoacoustic driving fields.
