标题： 超快操控纳米尺度的磁旋子 显示英文标题

标题： Ultrafast manipulations of nanoscale skyrmioniums

摘要： 下一代磁性器件的发展取决于在纳米尺度上快速操控磁性微结构。 提出了一种通用方法，通过高通量微磁模拟快速可靠地生成、控制和驱动纳米级的磁泡。 通过垂直磁场，在单层磁性纳米盘中实现了磁泡与磁畴壁状态之间的超快开关，并迅速改变其极性。 交替磁场下的转变机制与稳定磁场下的机制不同。 发现了新的磁泡纹理，如花状和风车状磁泡。 此外，这种纳米级的磁泡可以通过较弱的自旋极化电流在纳米带中快速且稳定地移动。 明确讨论了超快操控磁泡过程中涉及的物理机制。 这项工作为开发低功耗和纳米存储设备提供了关于拓扑磁泡结构操控和应用的进一步物理见解。 显示英文摘要

摘要： The advancement of next-generation magnetic devices depends on fast manipulating magnetic microstructures on the nanoscale. A universal method is presented for rapidly and reliably generating, controlling, and driving nano-scale skyrmioniums, through high-throughput micromagnetic simulations. Ultrafast switches are realized between skyrmionium and skyrmion states and rapidly change their polarities in monolayer magnetic nanodiscs by perpendicular magnetic fields. The transition mechanism by alternating magnetic fields differs from that under steady magnetic fields. New skyrmionic textures, such as flower-like and windmill-like skyrmions, are discovered. Moreover, this nanoscale skyrmionium can move rapidly and stably in nanoribbons using weaker spin-polarized currents. Explicit discussions are held regarding the physical mechanisms involved in ultrafast manipulations of skyrmioniums. This work provides further physical insight into the manipulation and applications of topological skyrmionic structures for developing low-power consumption and nanostorage devices.