论文标题
薄膜中零场非合成单一和互换的抗超磁磁性的出现
Emergence of zero-field non-synthetic single and interchanged antiferromagnetic skyrmions in thin films
论文作者
论文摘要
在未来的信息技术中，抗铁磁性（AFM）天际被认为是理想的局部拓扑磁位。与铁磁（FM）的天空相反，它们对Skyrmion Hall效应的免疫力可能会提供潜在的Terahertz动力学，同时对外部磁场和偶性相互作用不敏感。尽管在合成的AFM结构中观察到，并且是固有的AFM散装材料中复杂的Meronic纹理，但它们在赛车概念中至关重要的非合成AFM膜中的实现一直是难以捉摸的。在这里，我们将它们的存在在fcc ir（111）表面生长的PDFE双层板上的行afm cr膜中展示。使用第一原则，我们证明了AFM Skyrmions的单一且引人注目的互穿链的出现，这些链可以与PDFE托管的FM Skyrmions（包括FM Skyrmions）并存。除了识别用于固有的AFM天空源的理想材料平台外，我们预计未透明的打结的孤子将在AFM Spintronics中有希望的构建块。
Antiferromagnetic (AFM) skyrmions are envisioned as ideal localized topological magnetic bits in future information technologies. In contrast to ferromagnetic (FM) skyrmions, they are immune to the skyrmion Hall effect, might offer potential terahertz dynamics while being insensitive to external magnetic fields and dipolar interactions. Although observed in synthetic AFM structures and as complex meronic textures in intrinsic AFM bulk materials, their realization in non-synthetic AFM films, of crucial importance in racetrack concepts, has been elusive. Here, we unveil their presence in a row-wise AFM Cr film deposited on PdFe bilayer grown on fcc Ir(111) surface. Using first principles, we demonstrate the emergence of single and strikingly interpenetrating chains of AFM skyrmions, which can co-exist with the rich inhomogeneous exchange field, including that of FM skyrmions, hosted by PdFe. Besides the identification of an ideal platform of materials for intrinsic AFM skyrmions, we anticipate the uncovered knotted solitons to be promising building blocks in AFM spintronics.
