Magadeev E B, Vakhitov R M, Kanbekov R R
Bashkir State University, Ufa, Russia.
J Phys Condens Matter. 2022 Nov 7;51(1). doi: 10.1088/1361-648X/ac9dd7.
The paper investigates stability conditions of vortex-like inhomogeneities in perforated ferromagnet films with strong uniaxial anisotropy of the 'easy plane' type. It has been demonstrated that the non-trivial magnetic structures, which are characterized by the absence of an exit of the magnetization vector from the film's plane, can be observed at the absolute values of the anisotropy constant which exceed a certain threshold point. Possible methods (analytical, numeric, and empiric) have been developed to calculate this threshold value. Universally applicable estimates have been obtained of the minimum permissible value of the anisotropy constant for a number of the most important cases. Possible scenarios have been investigated for a loss of stability of the magnetic structure as the film's material parameters vary.
本文研究了具有“易平面”型强单轴各向异性的穿孔铁磁体薄膜中类涡旋不均匀性的稳定性条件。结果表明，当各向异性常数的绝对值超过某一阈值时，可观察到以磁化矢量不出膜平面为特征的非平凡磁结构。已开发出可能的方法（分析、数值和经验方法）来计算该阈值。已获得了一些最重要情况下各向异性常数最小允许值的通用估计。研究了随着薄膜材料参数变化磁结构失去稳定性的可能情形。
