| 报告题目 | Magnetic skyrmions in magnetic nanostructures |
| 报告人 | Dr. ZHOU Yan |
| 报告人单位 | University of Hong Kong |
| 报告时间 | 2015-05-20 |
| 报告地点 | 合肥微尺度物质科学国家实验室（9004） |
| 主办单位 | 合肥微尺度物质科学国家实验室、国际功能材料量子设计中心、中国科学技术大学物理系 |
| 报告介绍 | 报告摘要：
Recent experimental observation of magnetic droplet solitons and skyrmions in NC-STOs and ferromagnetic thin film with perpendicular magnetic anisotropy add two new members to the family of distinct and useful nanoscale magnetic objects. In this talk, I will present some of our recent work on micromagnetics simulations of magnetic droplet solitons and skyrmions in constricted geometries. I will demonstrate numerically and analytically that spin transfer torquedriven precession can stabilize so-called dynamical skyrmions even in the absence of Dzyaloshinskii-Moriya interaction (DMI), and I will describe their very promising properties in detail. From a more fundamental perspective, precession is hence a third independent possibility to stabilize a skyrmion, without the need for the conventional stabilization from either dipolar energy or DMI. I furthermore propose some new mechanisms for skyrmion creation and manipulation in nanostructures. I believe our study is fundamentally important for a better understanding of how to inject and control skyrmions as information carriers in nanoscale hybrid spintronic and magnonic devices.
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