Abstract

The influence of the competition of single-ion anisotropy and easy-plane anisotropy on the magnetic properties of the multilayer structure Co/Cu/Co is investigated. The peculiarities of the influence of anisotropy effects are revealed both in the vicinity of critical temperature T_c and in the low-temperature range T \( \ll \) T_c. The magnetic properties of the multilayer structure are numerically simulated using the anisotropic Heisenberg model. In the vicinity of T_c, easy-plane anisotropy is shown to exert a predominant influence on the magnetic properties of the structure as compared to the influence of single-ion anisotropy. In the low-temperature range, the switching of the magnetic state of the ferromagnetic film in an external field leads to the appearance of specific features in hysteresis effects due to the competition of two types of magnetic anisotropy. The magnetic structure exhibits a size-induced transition from the behavior caused by easy-plane anisotropy to the behavior caused by single-ion anisotropy. The revealed size-induced transition is accompanied by a spin-flop effect.

中文翻译：

---

各类各向异性竞争效应对磁性多层结构临界行为的影响

摘要

研究了单离子各向异性和易面各向异性的竞争对多层结构Co/Cu/Co磁性能的影响。在临界温度T _c附近和低温范围T \( \ll \) T _c中都揭示了各向异性效应影响的特殊性。使用各向异性海森堡模型对多层结构的磁性能进行数值模拟。在T _c附近，与单离子各向异性的影响相比，易平面各向异性对结构的磁性能产生主要影响。在低温范围内，由于两种磁各向异性的竞争，铁磁薄膜在外场中磁态的切换导致出现特定的磁滞效应特征。磁性结构表现出尺寸引起的从易平面各向异性引起的行为到单离子各向异性引起的行为的转变。所揭示的尺寸引起的转变伴随着自旋翻转效应。