论文标题
铁磁多层中的偶极稳定的一阶和二阶Antiskyrmions
Dipolar-stabilized first and second-order antiskyrmions in ferrimagnetic multilayers
论文作者
论文摘要
Skyrmions和Antiskyrmions是具有相反拓扑电荷的拓扑保护的自旋结构。特别是在共存的阶段中，这两种类型的磁准粒子可能会显示出令人着迷的物理和自旋装置的潜力。尽管在各种材料中观察到天空，但到现在为止，Antiskyrmions是D2D对称性的材料的独有的。在这项工作中，我们显示了基于Fe/GD的多层体中磁性偶极偶极相互作用稳定的一阶和二阶Antiskyrmions。我们通过IR插入层修改多层的磁性特性。使用Lorentz透射电子显微镜成像，我们观察到共存的动脉症，Bloch Skyrmions和Type-2气泡，并确定材料特性和磁场的范围，其中不同的自旋对象形成并散发。我们执行微磁模拟，以获得对所研究系统的更多了解，并得出结论，饱和磁化和单轴各向异性的还原导致存在不同自旋对象的动物园的存在，并且主要通过偶极相互作用稳定它们。
Skyrmions and antiskyrmions are topologically protected spin structures with opposite topological charge. Particularly in coexisting phases, these two types of magnetic quasi-particles may show fascinating physics and potential for spintronic devices. While skyrmions are observed in a wide range of materials, until now antiskyrmions were exclusive to materials with D2d symmetry. In this work, we show first and second-order antiskyrmions stabilized by magnetic dipole-dipole interaction in Fe/Gd-based multilayers. We modify the magnetic properties of the multilayers by Ir insertion layers. Using Lorentz transmission electron microscopy imaging, we observe coexisting antiskyrmions, Bloch skyrmions, and type-2 bubbles and determine the range of material properties and magnetic fields where the different spin objects form and dissipate. We perform micromagnetic simulations to obtain more insight into the studied system and conclude that the reduction of saturation magnetization and uniaxial anisotropy leads to the existence of this zoo of different spin objects and that they are primarily stabilized by dipolar interaction.
