论文标题
手性磁铁纳米级中状态的多样性
Diversity of states in a chiral magnet nanocylinder
论文作者
论文摘要
使用微磁模拟和透射电子显微镜中的微磁性模拟和离轴电子全息研究，研究了FEGE纳米助理中三维磁状态的多样性。特别是，我们报告了一个偶极子串的观察 - 一个由两个耦合Bloch点组成的自旋纹理 - 在几何限制下变得稳定。通过考虑纳米辅导员表面上的层损坏层的存在，可以在实验和理论相移图像之间获得定量一致。理论模型基于以下假设：损坏的表面层是由样品制备过程中聚焦离子束铣削产生的，具有与无定形FEGE合金的磁性特性相似。结果突出了考虑影响其磁性状态的这种纳米级样品的表面层的磁性特性的重要性。
The diversity of three-dimensional magnetic states in a FeGe nanocylinder is studied using micromagnetic simulations and off-axis electron holography in the transmission electron microscope. In particular, we report the observation of a dipole string -- a spin texture composed of two coupled Bloch points -- which becomes stable under geometrical confinement. Quantitative agreement is obtained between experimental and theoretical phase shift images by taking into account the presence of a damaged layer on the surface of the nanocylinder. The theoretical model is based on the assumption that the damaged surface layer, which results from focused ion beam milling during sample preparation, has similar magnetic properties to those of an amorphous FeGe alloy. The results highlight the importance of considering the magnetic properties of the surface layers of such nanoscale samples, which influence their magnetic states.
