| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces in Ceramics: Fundamental Structure—Property—Performance Relationships
|
| Presentation Title |
Geometrical Asymmetry Enabled Low Field Nucleation and Manipulation of Skyrmion at Magnetic Domain Boundaries in a Centro-symmetric Magnet |
| Author(s) |
Binbin Wang, Po-kuan Wu, Nuria Bagues, Qiang Zheng, Jiaqiang Yan, Mohit Randeria, David McComb |
| On-Site Speaker (Planned) |
Binbin Wang |
| Abstract Scope |
Understanding the dynamics of skyrmion nucleation and manipulation is important for applications in spintronic devices. Here, we have investigated the magnetic texture transformation using Lorentz transmission electron microscopy (LTEM) in a centrosymmetric magnet Fe3Sn2 with an engineered geometrical asymmetry in thickness gradient. Sample tilting and tunable magnetic field strength in LTEM enabled a new strategy for skyrmion nucleation at magnetic domain boundaries. This allows us to nucleate isolated skyrmions in Fe3Sn2 using in-plane fields (< 5 mT) that are two orders of magnitude lower than the previously reported critical magnetic field (~800 mT). Micromagnetic simulations combined with LTEM experiments reveal that the rotatable anisotropy and thickness dependence of the response to the external in-plane field are the critical factors for the skyrmion formation. The results suggest that magnetic materials with rotatable anisotropy are potential skyrmionic systems and provides a novel approach for manipulation of skyrmions in spintronic devices. |