A Monte Carlo simulated-annealing algorithm was used to study the magnetic state in an in-plane helimagnet layer on triangular lattice that exchange couples to an underlayer with strong out-of-plane anisotropy. In the single helimagnet layer with in-plane anisotropy (K), the formation of labyrinthlike domains with local spin spirals, instead of parallel stripes, is favored, and these domains rapidly transform into dense skyrmion crystals with increasing interfacial exchange coupling (J′), equivalent to a virtual magnetic field, and finally evolve to an out-of-plane uniform state at large enough J′. Moreover, with increasing K, the skyrmion crystal state can vary from regular 6-nearest-neighboring circular skyrmion arrangement to irregular squeezed skyrmions with less than 6 nearest neighbors when the in-plane anisotropy energy is higher than the interfacial exchange energy as the skyrmion number is maximized. Finally, we demonstrated that the antiferromagnetic underlayer cannot induce skyrmions while the chirality inversion can be achieved on top of an out-of-plane magnetization underlayer with 180° domain walls, supporting the experimental findings in FeGe thin film. This compelling advantage offers a fertile playground for exploring emergent phenomena that arise from interfacing magnetic skyrmions with additional functionalities.

使用蒙特卡罗模拟退火算法研究三角形晶格上的平面内电磁铁层中的磁态，该层交换耦合到具有强烈平面外各向异性的底层。在具有面内各向异性（K）的单层直升机磁铁层中，倾向于形成具有局部自旋螺旋而不是平行条纹的迷宫状畴，并且这些畴随着界面交换耦合（J '）的增加而迅速转变为致密的Skyrmion晶体。等于虚拟磁场，最终在足够大的J '处演化为面外均匀状态。此外，随着K的增加当平面各向异性能量高于界面交换能时，随着Skyrion数量的最大化，Skyrion的晶体状态可以从规则的6个相邻的圆形Skyrion排列变化为少于6个最近邻居的不规则挤压的Skyrion。最后，我们证明了反铁磁性底层不能诱导天空离子，而手性反转可以在具有180°畴壁的平面外磁化底层之上实现，这支持了FeGe薄膜中的实验结果。这一引人注目的优势为探索由磁性天体与其他功能接口而产生的新兴现象提供了肥沃的游乐场。