Confinement and Protection of Skyrmions by Patterns of Modified Magnetic Properties.
Confinement and Protection of Skyrmions by Patterns of Modified Magnetic Properties.
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DOI：
10.1021/acs.nanolett.1c00865
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发表时间：
2021-05
期刊：
影响因子：
10.8
通讯作者：
Kentaro Ohara;Xichao Zhang;Yinling Chen;Zonhan Wei;Yungui Ma;J. Xia;Yan Zhou;Xiaoxi Liu
中科院分区：
文献类型：
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作者：
Kentaro Ohara;Xichao Zhang;Yinling Chen;Zonhan Wei;Yungui Ma;J. Xia;Yan Zhou;Xiaoxi Liu
磁性Skyrmions是一种用途广泛的拓扑激发，可用作非易失性信息载体。天子在通道中的限制对于任何基于天子的积累和传输的应用都是基本的。在这里，我们报道了一种方法，它允许通过工程能垒和势垒在设计的通道中有效地控制天空微子的位置，这是通过利用具有修改的磁性特性的图案的边界在磁性多层膜中实现的。我们从实验和计算上证明，具有修正的垂直磁各向异性和Dzyaloshinskii-Moriya相互作用的区域边界可以吸引或排斥Skyrmions。通过制作具有改进磁性的正方形和条形图案，我们展示了建立用于限制、积累和输运Skyrmions的可靠通道的可能性，这有效地保护了Skyrmions在器件边缘不被破坏。我们的结果对设计使用静态或动态天子的自旋电子应用是有用的。
Magnetic skyrmions are versatile topological excitations that can be used as nonvolatile information carriers. The confinement of skyrmions in channels is fundamental for any application based on the accumulation and transport of skyrmions. Here, we report a method that allows effective position control of skyrmions in designed channels by engineered energy barriers and wells, which is realized in a magnetic multilayer film by harnessing the boundaries of patterns with modified magnetic properties. We experimentally and computationally demonstrate that skyrmions can be attracted or repelled by the boundaries of areas with modified perpendicular magnetic anisotropy and Dzyaloshinskii-Moriya interaction. By fabricating square and stripe patterns with modified magnetic properties, we show the possibility of building reliable channels for confinement, accumulation, and transport of skyrmions, which effectively protect skyrmions from being destroyed at the device edges. Our results are useful for the design of spintronic applications using either static or dynamic skyrmions.