Zhang Yuelin, Wang Chuanshou, Huang Houbing, Lu Jingdi, Liang Renrong, Liu Jian, Peng Renci, Zhang Qintong, Zhang Qinghua, Wang Jing, Gu Lin, Han Xiu-Feng, Chen Long-Qing, Ramesh Ramamoorthy, Nan Ce-Wen, Zhang Jinxing
Department of Physics, Beijing Normal University, Beijing 100875, China.
Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China.
Sci Bull (Beijing). 2020 Aug 15;65(15):1260-1267. doi: 10.1016/j.scib.2020.04.008. Epub 2020 Apr 8.
The ability to control magnetic vortex is critical for their potential applications in spintronic devices. Traditional methods including magnetic field, spin-polarized current etc. have been used to flip the core and/or reverse circulation of vortex. However, it is challenging for deterministic electric-field control of the single magnetic vortex textures with time-reversal broken symmetry and no planar magnetic anisotropy. Here it is reported that a deterministic reversal of single magnetic vortex circulation can be driven back and forth by a space-varying strain in multiferroic heterostructures, which is controlled by using a bi-axial pulsed electric field. Phase-field simulation reveals the mechanism of the emerging magnetoelastic energy with the space variation and visualizes the reversal pathway of the vortex. This deterministic electric-field control of the single magnetic vortex textures demonstrates a new approach to integrate the low-dimensional spin texture into the magnetoelectric thin film devices with low energy consumption.
控制磁涡旋的能力对于其在自旋电子器件中的潜在应用至关重要。包括磁场、自旋极化电流等在内的传统方法已被用于翻转涡旋的核心和/或反向循环。然而，对于具有时间反演对称性破缺且无平面磁各向异性的单个磁涡旋纹理进行确定性电场控制具有挑战性。本文报道，在多铁性异质结构中，通过空间变化应变可驱动单个磁涡旋循环的确定性反转，该应变由双轴脉冲电场控制。相场模拟揭示了随空间变化出现的磁弹性能的机制，并可视化了涡旋的反转路径。这种对单个磁涡旋纹理的确定性电场控制展示了一种将低维自旋纹理以低能耗集成到磁电薄膜器件中的新方法。
