论文标题
确定界面dzyaloshinskii-moriya的关键点，从不对称气泡域扩展
Key points in the determination of the interfacial Dzyaloshinskii-Moriya interaction from asymmetric bubble domain expansion
论文作者
论文摘要
使用Magneto-Optics，使用了不同的模型来评估来自非对称气泡扩张方法的界面Dzyaloshinskii-Moriya相互作用（DMI）。在这里，我们研究了具有垂直偏见的一系列不同磁性多层的最有希望的候选者。基于标准蠕变假设的模型在DW粗糙度较高时无法再现域壁（DW）速度。我们的结果表明，DW粗糙度和样品层的界面粗糙度相关。此外，我们为如何使用这种流行方法提供了有关如何获得DMI值的可靠结果的指导。在同一样品上的Brillouin光散射（BLS）测量结果的比较表明，BLS方法通常会导致更高的DMI测量值。
Different models have been used to evaluate the interfacial Dzyaloshinskii-Moriya interaction (DMI) from the asymmetric bubble expansion method using magneto-optics. Here we investigate the most promising candidates over a range of different magnetic multilayers with perpendicular anisotropy. Models based on the standard creep hypothesis are not able to reproduce the domain wall (DW) velocity profile when the DW roughness is high. Our results demonstrate that the DW roughness and the interface roughness of the sample layers are correlated. Furthermore, we give guidance on how to obtain reliable results for the DMI value with this popular method. A comparison of the results with Brillouin light scattering (BLS) measurements on the same samples shows that the BLS approach often results in higher measured values of DMI.
