发表机构
Université de Lorraine; CNRS; Tohoku University（洛林大学; 法国国家科学研究中心; 东北大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究结合单脉冲光学开关与电流诱导运动，实现对磁性斯格明子自旋结构的确定性操控，为光自旋电子器件奠定基础。
AI 中文摘要
磁性斯格明子因其位置可通过电流操控而成为有前景的纳米级信息载体。额外具备对自旋结构的确定性控制能力将允许磁性斯格明子用作多态比特，进一步扩展斯格明子器件的功能。这种控制可通过将全光学螺旋度无关的磁化开关（AO-HIS）与磁性斯格明子耦合来实现。这在一个Pt/Ir/CoB/Gd/Pt多层膜中得以实现，该多层膜被设计用于稳定磁性斯格明子，同时通过单个超快激光脉冲实现AO-HIS。激光激发用于写入斯格明子织构，其极性由施加的小型垂直磁场选择。随后使用单个30飞秒激光脉冲切换包含斯格明子织构的照明区域的磁化，无需任何磁场或电流脉冲即可反转其极性。这确立了斯格明子自旋结构的确定性光学开关作为一种新的操控通道，区别于先前报道的光学成核和湮灭。然后将材料图案化为导线，以将光学操控与电流诱导的斯格明子运动相结合。这些结果为光自旋电子斯格明子器件铺平了道路，其中光编程斯格明子的内部状态，而电流控制其位置。
英文摘要
Magnetic skyrmions are promising nanoscale information carriers because their position can be manipulated by electrical currents. The additional ability of deterministic control of the spin structure would allow the use of magnetic skyrmions as multi-state bits, expanding the capabilities of skyrmion devices further. Such control could be realized by coupling all-optical helicity independent switching of magnetization (AO-HIS) to magnetic skyrmions. This is realized in a Pt/Ir/CoB/Gd/Pt multilayer that is engineered to stabilize magnetic skyrmions and, at the same time, enable AO-HIS by single ultrafast laser pulse. Laser excitation is used to write skyrmionic textures, whose polarity is selected by a small applied out-of-plane field. A single 30 fs laser pulse is then used to toggle the magnetization of an illuminated region containing skyrmionic textures, reversing their polarities without requiring any magnetic field or current pulses. This establishes deterministic optical switching of the skyrmion spin structure as a new manipulation channel, distinct from previously reported optical nucleation and annihilation. The material is then patterned into a wire, to combine the optical manipulation with current-induced skyrmion motion. These results establish a route toward opto-spintronic skyrmion devices in which light programs the internal state of a skyrmion and electrical currents control its position.
Comments16 pages (main) + 5 pages (supporting information). 5 figures (main) + 4 figures (supporting information). Submitted to Advanced Materials
