论文标题
对磁性天空出现的频带填充影响：IR上的PD/FE和PD/CO Bilayers（111）
Band filling effects on the emergence of magnetic skyrmions: Pd/Fe and Pd/Co bilayers on Ir(111)
论文作者
论文摘要
结构相似的过渡金属系统可以具有很大不同的磁性特性。对于IR（111）的双层，PD/Fe/ir（111）基态具有完善的非结合性自旋纹理，而PD/CO/IR（111）呈现一个pd/fe/ir（111）。为了揭示这些不同磁性行为的起源，这里进行了对IR（111）的PD/Fe和PD/CO BiLayers的研究。 Based on the obtained \textit{ab-initio} electronic structure, exchange coupling parameters ($J_{ij}$) and Dzyaloshinskii-Moriya interactions (DMI), we demonstrate that, although in Pd/Co/Ir(111) the DMI is significant, two ingredients play a key role on the origin of noncollinearity in Pd/Fe/Ir(111): the presence磁性挫败感和平面内DMI，都具有远距离影响。两个系统中的$ j_ {ij} $和DMI行为可以用一个简单的刚性模型来解释。同样，通过使用从PD/CO/IR（111）调整为PD/Fe/IR（111）\ TextIt {AB-Initio}值的磁性参数的自旋动力学模拟，我们可以找到最初的FM PD/CO/IR（111）中天空相位的出现条件。
Structurally similar transition metal systems can have widely differing magnetic properties. A prime example of this is found for bilayers on Ir(111), where Pd/Fe/Ir(111) ground state has a well-established noncollinear spin texture, while Pd/Co/Ir(111) present a ferromagnetic (FM) single-domain. To unravel the origins of these different magnetic behaviors, an investigation of Pd/Fe and Pd/Co bilayers on Ir(111), is here performed. Based on the obtained \textit{ab-initio} electronic structure, exchange coupling parameters ($J_{ij}$) and Dzyaloshinskii-Moriya interactions (DMI), we demonstrate that, although in Pd/Co/Ir(111) the DMI is significant, two ingredients play a key role on the origin of noncollinearity in Pd/Fe/Ir(111): the presence of magnetic frustrations and a much more in-plane DMI, both with a long-range influence. The $J_{ij}$ and DMI behaviors in both systems can be explained in terms of a simple rigid-band-like model. Also, by performing spin-dynamics simulations with the magnetic parameters tuned from the Pd/Co/Ir(111) to Pd/Fe/Ir(111) \textit{ab-initio} values, we could find conditions for the emergence of skyrmionic phases in the originally FM Pd/Co/Ir(111).
