Chiral spin structures, such as skyrmions, are topologically nontrivial magnetization configurations, which have potential applications in magnetic recording media. In particular, an antiferromagnetically coupled system that hosts skyrmions is of great interest because of high-speed skyrmion motion and reduced skyrmion Hall effect. Here, we consider TbCo/GdFe-based amorphous ferrimagnetic system showing chiral stripe domains and Néel-type skyrmions. It is observed that skyrmionic configurations are stabilized with the help of dipolar interactions that exist in the system. Optimized thicknesses of TbCo (30 nm) and GdFe (6 nm) show isolated skyrmions in both the layers with average skyrmion diameter of 40 ± 5 nm. We have also investigated a phase diagram in a wide range of layer thickness, which represents the presence of the mixture of either vortex, chiral stripes, or/and Néel-type skyrmions. To understand the underlying phenomena which help chiral ferrimagnetism in this kind of amorphous system, we perform layer-resolved micromagnetic modeling. We found variety of chiral textures in a wide thickness range of ferrimagnetic bilayer systems, which may be useful for fundamental understanding of formation of skyrmion and their application in spintronic devices.

手性自旋结构，例如天文离子，在拓扑上是不重要的磁化结构，在磁记录介质中具有潜在的应用。尤其是，由于天蝎子的高速运动和减少的天蝎子霍尔效应，承载天蝎子的反铁磁耦合系统引起了人们的极大兴趣。在这里，我们考虑基于TbCo / GdFe的非晶亚铁磁系统，该系统显示手性条带域和Néel型天生离子。可以观察到，借助系统中存在的偶极相互作用，天体离子的构型得以稳定。TbCo（30 nm）和GdFe（6 nm）的最佳厚度在两层中均显示出孤立的Skyrion，其平均Skyrion直径为40±5 nm。我们还研究了各种厚度层的相图，它表示存在涡流，手性条纹或/和Néel型天体离子的混合物。为了了解在这种非晶系统中有助于手性亚铁磁性的潜在现象，我们进行了层解析微磁建模。我们发现在较宽的亚铁磁性双层系统厚度范围内，各种手性结构可能有助于基本理解天生离子的形成及其在自旋电子器件中的应用。