论文标题
纳米结构的kagome磁铁中电流控制的拓扑磁转换
Current-Controlled Topological Magnetic Transformations in a Nanostructured Kagome Magnet
论文作者
论文摘要
拓扑磁电荷Q是描述磁域并确定其有趣的电磁特性的基本参数。通过电气方法以控制方式切换Q的能力，可以在未来的Spintronic设备中灵活操纵电磁行为。在这里，我们报告了Q = -1 Skyrmions与Q = 0条纹或kagome Crystal Fe $ _3 $ _3 $ sn $ _2 $中的室温电流控制的拓扑磁转换。我们表明，可以通过调谐〜10 $^{10} $ a $^{ - 2} $的纳秒脉冲电流的密度来实现可再现和可逆的天空泡沫和天际裂纹转换。进一步的数值模拟表明，自旋转移扭矩与焦耳热加热效应结合了电流诱导的拓扑磁转换。
Topological magnetic charge Q is a fundamental parameter that describes the magnetic domains and determines their intriguing electromagnetic properties. The ability to switch Q in a controlled way by electrical methods allows for flexible manipulation of electromagnetic behavior in future spintronic devices. Here we report the room-temperature current-controlled topological magnetic transformations between Q = -1 skyrmions and Q = 0 stripes or type-II bubbles in a kagome crystal Fe$_3$Sn$_2$. We show that the reproducible and reversible skyrmion-bubble and skyrmion-stripe transformations can be achieved by tuning the density of nanosecond pulsed current of the order of ~10$^{10}$ A$^{-2}$. Further numerical simulations suggest that spin-transfer torque combined with Joule thermal heating effects determine the current-induced topological magnetic transformations.
