| Autor: |
Cheng, Ran, Li, Maxwell, Sapkota, Arjun, Rai, Anish, Pokhrel, Ashok, Mewes, Tim, Mewes, Claudia, Xiao, Di, De Graef, Marc, Sokalski, Vincent |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 99, 184412 (2019) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.99.184412 |
| Popis: |
It is well established that the spin-orbit interaction in heavy metal/ferromagnet heterostructures leads to a significant interfacial Dzyaloshinskii-Moriya Interaction (DMI) that modifies the internal structure of magnetic domain walls (DWs) to favor N\'{e}el over Bloch type configurations. However, the impact of such a transition on the structure and stability of internal DW defects (e.g., vertical Bloch lines) has not yet been explored. We present a combination of analytical and micromagnetic calculations to describe a new type of topological excitation called a DW Skyrmion characterized by a $360^\circ$ rotation of the internal magnetization in a Dzyaloshinskii DW. We further propose a method to identify DW Skyrmions experimentally using Fresnel mode Lorentz TEM; simulated images of DW Skyrmions using this technique are presented based on the micromagnetic results. |
| Databáze: |
arXiv |
| Externí odkaz: |
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