Direct Imaging of a Zero-Field Target Skyrmion and Its Polarity Switch in a Chiral Magnetic Nanodisk
Direct Imaging of a Zero-Field Target Skyrmion and Its Polarity Switch in a Chiral Magnetic Nanodisk
复制标题
手性磁性纳米盘中零场目标斯格明子的直接成像及其极性转换
DOI：
10.1103/physrevlett.119.197205
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发表时间：
2017
影响因子：
8.6
通讯作者：
Dunin-Borkowski Rafal E.
中科院分区：
文献类型：
--
作者：
Zheng Fengshan;Li Hang;Wang Shasha;Song Dongsheng;Jin Chiming;Wei Wenshen;Kovacs Andras;Zang Jiadong;Tian Mingliang;Zhang Yuheng;Du Haifeng;Dunin-Borkowski Rafal E.
目标Skyrmion是具有双重简并性的磁通闭合自旋纹理，并且有望作为下一代通用存储器中的二进制状态。虽然它在纳米图案手性磁体中的形成已经被预测，但它的观察仍然具有挑战性。在这里，我们使用离轴电子全息记录图像的目标Skyrmions在一个160 nm直径的纳米盘的手性磁铁FeGe。我们比较实验测量与数值模拟，演示两个稳定的简并目标Skyrmion基态，具有相反的极性和旋转意义之间的切换，并讨论所观察到的切换机制。
A target Skyrmion is a flux-closed spin texture that has twofold degeneracy and is promising as a binary state in next generation universal memories. Although its formation in nanopatterned chiral magnets has been predicted, its observation has remained challenging. Here, we use off-axis electron holography to record images of target Skyrmions in a 160-nm-diameter nanodisk of the chiral magnet FeGe. We compare experimental measurements with numerical simulations, demonstrate switching between two stable degenerate target Skyrmion ground states that have opposite polarities and rotation senses, and discuss the observed switching mechanism.