Skyrmion Transport Modified by Surface Terraces in Magnetic Multilayers,Physical Review Applied

当前位置： X-MOL 学术 › Phys. Rev. Appl. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Skyrmion Transport Modified by Surface Terraces in Magnetic Multilayers
Physical Review Applied ( IF 3.8 ) Pub Date : 2021-07-20 , DOI: 10.1103/physrevapplied.16.014050
Linjie Liu _{1,

2} , Weijin Chen _{1,

2,

3} , Yue Zheng _{1,

2}

Affiliation

While the modification of skyrmion motion by edges and defects has been widely discussed, how the motion of skyrmions would be affected by a surface terrace remains unclear. In this work, micromagnetic simulations are performed to reveal the skyrmion transport behaviors in multilayers modified by a surface terrace. It is found that skyrmions can be partially nucleated or annihilated at the surface terrace, and the nucleation or annihilation process is related to the competition between the nucleation or annihilation barrier and the binding energy of skyrmions. Interestingly, such processes can effectively modulate the transport characteristics of the skyrmion. The skyrmion decelerates or is even blocked in the annihilation process, whereas it accelerates in the nucleation process. As a result, the skyrmion mobility can be very different between upward and downward motion, and the surface terrace can even be viewed as a surface diode for skyrmions. Meanwhile, a transverse shift of the skyrmion along the terrace occurs in the nucleation process and the shifting distance depends on the applied current. In this way, the skyrmion can be shifted to a specific trajectory by controlling the current. Based on these effects, we propose two prototypal skyrmionic devices, the skyrmion surface diode and skyrmion track selector, which are potentially useful in skyrmionics.

中文翻译：

由磁性多层中的表面阶地修改的 Skyrmion 传输

虽然通过边缘和缺陷对斯格明子运动的修改已被广泛讨论，但斯格明子的运动将如何受到表面阶地的影响仍不清楚。在这项工作中，进行了微磁模拟以揭示由表面阶地修改的多层中的斯格明子传输行为。发现斯格明子可以在地表阶地部分成核或湮灭，成核或湮灭过程与成核或湮灭势垒与斯格明子结合能的竞争有关。有趣的是，这样的过程可以有效地调节斯格明子的传输特性。斯格明子在湮灭过程中减速甚至受阻，而在成核过程中加速。因此，向上和向下运动之间的斯格明子迁移率可能非常不同，甚至可以将表面阶地视为斯格明子的表面二极管。同时，在成核过程中会发生斯格明子沿平台的横向移动，移动距离取决于施加的电流。通过这种方式，可以通过控制电流将斯格明子转移到特定的轨迹。基于这些效应，我们提出了两种原型斯格明子器件，斯格明子表面二极管和斯格明子轨道选择器，它们在斯格明子学中可能有用。斯格明子可以通过控制电流移动到特定的轨迹。基于这些效应，我们提出了两种原型斯格明子器件，斯格明子表面二极管和斯格明子轨道选择器，它们在斯格明子学中可能有用。斯格明子可以通过控制电流移动到特定的轨迹。基于这些效应，我们提出了两种原型斯格明子器件，斯格明子表面二极管和斯格明子轨道选择器，它们在斯格明子学中可能有用。

更新日期：2021-07-20

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11