Nondestructive ultrafast steering of a magnetic vortex by terahertz pulses
Nondestructive ultrafast steering of a magnetic vortex by terahertz pulses
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DOI：
10.1038/s41427-020-0217-8
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发表时间：
2019-07
影响因子：
9.7
通讯作者：
Dongxing Yu;Jiyong Kang;J. Berakdar;C. Jia
中科院分区：
文献类型：
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作者：
Dongxing Yu;Jiyong Kang;J. Berakdar;C. Jia
在超快时间尺度上以可重复的方式控制磁涡流动力学是寻求低能耗高效自旋电子器件的关键因素。为了有用，理想的控制方案应该是快速的，可扩展的，非侵入性的，并导致可靠的磁开关。这些要求，特别是改变涡旋手性和/或极性的再现性，目前还不能通过外部磁场、自旋极化电流、自旋波或激光脉冲来实现磁涡旋开关。在这里，我们展示了一种新的封装的skyrμ介子介导的旋涡开关过程，该过程由一系列简单的皮秒电场脉冲通过磁电相互作用驱动。涡旋的手性和极性都表现出明确的反转行为。四种不同磁涡流状态之间的明确重复切换为基于非易失性磁涡流的信息存储和处理提供了一种高效、高度局域化和连贯的控制方法。
Electric control of magnetic vortex dynamics in a reproducible way on an ultrafast time scale is a key element in the quest for efficient spintronic devices with low-energy consumption. To be useful, the control scheme should ideally be swift, be scalable, be noninvasive, and result in reliable magnetic switching. Such requirements, particularly the reproducibility of altering the vortex chirality and/or polarity, are not yet met by magnetic vortex switching via external magnetic fields, spin-polarized currents, spin waves, or laser pulses. Here, we demonstrate a novel packaged-skyrmion-mediated vortex switching process driven by a simple sequence of picosecond electrical field pulses via magnetoelectric interactions. Both the vortex chirality and polarity show a well-defined reversal behavior. The unambiguous repeated switching between four different magnetic vortex states provides an energy-efficient, highly localized, and coherent control method for nonvolatile magnetic vortex-based information storage and handling.