论文标题
PT/CO/CO/NI/IR多层的磁性域壁下结构
Magnetic domain wall substructures in Pt/Co/Ni/Ir multi-layers
论文作者
论文摘要
我们使用微磁理论和Lorentz传输电子显微镜（LTEM）的组合检查了[pt/（co/ni）$ _ m $/ir] $ _ n $多层的磁性域壁（DWS）的子结构。 Q = $ \ pm的热稳定性计算使用测量片的弹性频段（GNEB）模型进行了支持其在室温下的亚稳定性，进行了使用测量的弹性弹性频段（GNEB）模型进行了Q = $ \ pm $ 1的子结构（2- $π$垂直BLOCH线（VBL）和DW Skyrmions）。界面Dzyaloshinskii-Moriya相互作用（DMI）和膜厚度的实验变化揭示了存在这些子结构的条件，并可以形成磁相图。发现厚度的减小有利于Q = $ \ pm $ 1的子结构，这可能是由于抑制了混合DW的抑制。这项研究的结果为检查手性磁性材料中的1-D DW子结构提供了重要的框架。
We examine the substructures of magnetic domain walls (DWs) in [Pt/(Co/Ni)$_M$/Ir]$_N$ multi-layers using a combination of micromagnetic theory and Lorentz transmission electron microscopy (LTEM). Thermal stability calculations of Q=$\pm$1 substructures (2-$π$ vertical Bloch lines (VBLs) and DW skyrmions) were performed using a geodesic nudged elastic band (GNEB) model, which supports their metastability at room temperature. Experimental variation in strength of the interfacial Dzyaloshinskii-Moriya interaction (DMI) and film thickness reveals conditions under which these substructures are present and enables the formation of a magnetic phase diagram. Reduced thickness is found to favor Q=$\pm$1 substructures likely due to the suppression of hybrid DWs. The results from this study provide an important framework for examining 1-D DW substructures in chiral magnetic materials.
