Janardhanan S, Mielcarek S, Głowiński H, Kowacz M, Kuświk P, Krawczyk M, Trzaskowska A
ISQI, Faculty of Physics, Adam Mickiewicz University, Poznan, Poland.
Institute of Molecular Physics, Polish Academy of Science, Poznan, Poland.
Sci Rep. 2023 Dec 15;13(1):22494. doi: 10.1038/s41598-023-49859-8.
We have carried out an experimental investigation of the spin-wave dynamics in the Au/CoFeB/Au multilayer consisting of a ferromagnetic film with thicknesses of 0.8, 0.9 and 1.0 nm. We employed the Brillouin light scattering spectroscopy to measure the frequency of the spin waves in dependence on the wave vector. Additionally, we characterized the samples by ferromagnetic resonance measurements. We found that the considered samples exhibit perpendicular magnetic anisotropy with low damping, indicating small pumping effects. Furthermore, we found a nonreciprocal dispersion relation pointing at a non-negligible Dzyaloshinskii-Moriya interaction. These results make the Au/CoFeB/Au multilayer a compelling subject for further analysis and as a potential material for future applications within magnonics.
我们对由厚度为0.8、0.9和1.0纳米的铁磁薄膜组成的Au/CoFeB/Au多层膜中的自旋波动力学进行了实验研究。我们采用布里渊光散射光谱来测量自旋波频率与波矢的依赖关系。此外，我们通过铁磁共振测量对样品进行了表征。我们发现，所考虑的样品表现出具有低阻尼的垂直磁各向异性，这表明泵浦效应较小。此外，我们发现了一个非互易色散关系，这表明存在不可忽略的Dzyaloshinskii-Moriya相互作用。这些结果使得Au/CoFeB/Au多层膜成为进一步分析的引人关注的对象，并且作为磁子学中未来应用的潜在材料。
