Laboratory of Design of New Materials, Bashkir State University, 450076 Bashkortostan, Russia.
J Phys Condens Matter. 2023 Mar 24;35(21). doi: 10.1088/1361-648X/acc3ea.
The paper investigates vortex-like structures observed in ferromagnetic films with strong uniaxial easy-plane anisotropy in the presence of topological features in them. Two approaches to the creation of such features are considered, namely, perforation of the sample and the inclusion of artificial defects in it, and a theorem on their equivalence is proved, according to which the structure of magnetic inhomogeneities arising in the film itself turns out to be the same for both approaches. In the second case, the properties of magnetic vortices formed on defects are also studied, and for cylindrical defects explicit analytical expressions for the energy and configuration of vortices are obtained, which are applicable in a wide range of values of material parameters.
本文研究了在具有强单轴易面各向异性的铁磁薄膜中存在拓扑特征时观察到的类涡旋结构。考虑了两种产生此类特征的方法，即样品穿孔和在其中包含人工缺陷，并证明了它们等效的定理，根据该定理，在两种方法中，出现在薄膜本身中的磁不均匀性的结构是相同的。在第二种情况下，还研究了在缺陷上形成的磁涡旋的性质，并为圆柱缺陷获得了涡旋能量和构型的显式解析表达式，这些表达式适用于材料参数的广泛范围。
