论文标题
各向异性Skyrmion在超薄外延au $ _ {0.67} $ pt $ _ {0.33} $/co/co/w电影中
Anisotropic skyrmion bubbles in ultra-thin epitaxial Au$_{0.67}$Pt$_{0.33}$/Co/W films
论文作者
论文摘要
我们研究了磁性特性的对称性和超薄外展上的磁纹理$ _ $ _ {0.67} $ pt $ _ {0.33} $/co/w，一种模型系统，一种表现出垂直磁性各向异性和界面dzyaloshinskii-moriya Interaction（Dmi）的模型系统。作为一个特殊的特征，Co/W接口引起的C $ _ \ MATHRM {2V} $晶体对称性会导致钴层中的额外单轴内磁动率。具有磁性灵敏度的光发射电子显微镜揭示了平行于硬面内磁化轴平行的自组织磁条带域的形成。当沿着该轴定向时，我们将这种行为归因于下部域壁的能量，在该轴上，DMI和平面磁各向异性都有利于Néel结构域壁构型。各向异性结构域壁的能量还导致在弱平面外磁场中形成椭圆形的气泡。
We studied the symmetry of magnetic properties and the resulting magnetic textures in ultra-thin epitaxial Au$_{0.67}$Pt$_{0.33}$/Co/W, a model system exhibiting perpendicular magnetic anisotropy and interface Dzyaloshinskii-Moriya interaction (DMI). As a peculiar feature, the C$_\mathrm{2v}$ crystal symmetry induced by the Co/W interface results in an additional uniaxial in-plane magnetic anisotropy in the cobalt layer. Photoemission electron microscopy with magnetic sensitivity reveals the formation of self-organized magnetic stripe domains oriented parallel to the hard in-plane magnetization axis. We attribute this behavior to the lower domain wall energy when oriented along this axis, where both the DMI and the in-plane magnetic anisotropy favor a Néel domain wall configuration. The anisotropic domain wall energy also leads to the formation of elliptical skyrmion bubbles in a weak out-of-plane magnetic field.
