Lorentz TEM investigation of chiral spin textures and Néel Skyrmions in asymmetric [Pt/(Co/Ni)M/Ir]N multi-layer thin films
| Autor: | Maxwell Li, Vincent Sokalski, Derek Lau, Marc De Graef |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Magnetic domain Condensed matter physics Spintronics Skyrmion Context (language use) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Transmission electron microscopy 0103 physical sciences General Materials Science Thin film 010306 general physics 0210 nano-technology Spin (physics) Chirality (chemistry) |
| Zdroj: | Physical Review Materials. 3 |
| ISSN: | 2475-9953 |
| DOI: | 10.1103/physrevmaterials.3.064409 |
| Popis: | We examine magnetic domain patterns in symmetric ${[\mathrm{Co}/\mathrm{Ni}]}_{M}$ and asymmetric ${[\mathrm{Pt}/{(\mathrm{Co}/\mathrm{Ni})}_{M}/\mathrm{Ir}]}_{N}$ multi-layers by using Fresnel mode Lorentz transmission electron microscopy (LTEM). In the symmetric multi-layers, where the Dzyaloshinskii--Moriya interaction is expected to be negligible, we observe Bloch-type domain walls with no preferred chirality. In the asymmetric multi-layers, where significant interfacial DMI is present, we observe domain patterns with chiral N\'eel domain walls, which evolve into sub-100 nm isolated N\'eel Skyrmions with the application of a perpendicular field at room temperature. The impact of layer thickness and film stack on interfacial magnetic properties is discussed in the context of developing a tunable multi-layer system for future spintronic applications. |
| Databáze: | OpenAIRE |
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