Department of Physics, University of Hamburg, 20355, Hamburg, Germany.
Department of Physics, National Tsing Hua University, 30013, Hsinchu, Taiwan.
Nat Commun. 2018 Apr 20;9(1):1571. doi: 10.1038/s41467-018-04015-z.
Magnetic skyrmions are localized nanometer-sized spin configurations with particle-like properties, which are envisioned to be used as bits in next-generation information technology. An essential step toward future skyrmion-based applications is to engineer key magnetic parameters for developing and stabilizing individual magnetic skyrmions. Here we demonstrate the tuning of the non-collinear magnetic state of an Fe double layer on an Ir(111) substrate by loading the sample with atomic hydrogen. By using spin-polarized scanning tunneling microscopy, we discover that the hydrogenated system supports the formation of skyrmions in external magnetic fields, while the pristine Fe double layer does not. Based on ab initio calculations, we attribute this effect to the tuning of the Heisenberg exchange and the Dzyaloshinsky-Moriya interactions due to hydrogenation. In addition to interface engineering, hydrogenation of thin magnetic films offers a unique pathway to design and optimize the skyrmionic states in low-dimensional magnetic materials.
磁斯格明子是具有粒子特性的局域纳米级自旋组态，有望被用作下一代信息技术中的比特。未来基于斯格明子的应用的一个重要步骤是对关键磁参数进行工程设计，以开发和稳定单个磁斯格明子。在这里，我们通过在样品中加载原子氢来演示 Ir(111)衬底上 Fe 双层的非共线磁态的调谐。通过使用自旋极化扫描隧道显微镜，我们发现氢化系统在外磁场中支持斯格明子的形成，而原始的 Fe 双层则不支持。基于第一性原理计算，我们将这种效应归因于氢化引起的海森堡交换和 Dzyaloshinsky-Moriya 相互作用的调谐。除了界面工程，薄磁膜的氢化为设计和优化低维磁性材料中的斯格明子态提供了一条独特的途径。
Zotero 插件
