The evolution of skyrmions in Ir/Fe/Co/Pt multilayers and their topological Hall signature
| Autor: | Anthony K. C. Tan, A. Almoalem, M. Raju, Ophir M. Auslaender, Christos Panagopoulos, A. Yagil, Fusheng Ma, Anjan Soumyanarayanan |
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| Přispěvatelé: | School of Physical and Mathematical Sciences |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Materials science Science General Physics and Astronomy 02 engineering and technology Topology Article General Biochemistry Genetics and Molecular Biology 03 medical and health sciences Electrical resistivity and conductivity Hall effect Physics [Science] Magnetic Properties and Materials lcsh:Science Range (particle radiation) Multidisciplinary Spintronics Skyrmion General Chemistry Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Magnetic field 030104 developmental biology Computer Science::Computer Vision and Pattern Recognition lcsh:Q 0210 nano-technology Signature (topology) |
| Zdroj: | Nature Communications, Vol 10, Iss 1, Pp 1-7 (2019) Nature Communications |
| Popis: | The topological Hall effect (THE) is the Hall response to an emergent magnetic field, a manifestation of the skyrmion Berry-phase. As the magnitude of THE in magnetic multilayers is an open question, it is imperative to develop comprehensive understanding of skyrmions and other chiral textures, and their electrical fingerprint. Here, using Hall-transport and magnetic-imaging in a technologically viable multilayer film, we show that topological-Hall resistivity scales with the isolated-skyrmion density over a wide range of temperature and magnetic-field, confirming the impact of the skyrmion Berry-phase on electronic transport. While we establish qualitative agreement between the topological-Hall resistivity and the topological-charge density, our quantitative analysis shows much larger topological-Hall resistivity than the prevailing theory predicts for the observed skyrmion density. Our results are fundamental for the skyrmion-THE in multilayers, where interfacial interactions, multiband transport and non-adiabatic effects play an important role, and for skyrmion applications relying on THE. The topological Hall Effect (THE) enhances our understanding of chiral spin textures such as skyrmions, but important aspects of the relationship are still unclear. Here the authors present a comprehensive picture for the spin texture evolution and corresponding THE signatures in a multilayer film using Hall transport and magnetic imaging. |
| Databáze: | OpenAIRE |
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