Instability of skyrmions in magnetic fields
| Autor: | Timofey Balashov, Ryohei Nemoto, Wulf Wulfhekel, Patrick M. Buhl, Toyo Kazu Yamada, Loic Mougel, Marie Hervé, Julian Skolaut, Bertrand Dupé |
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| Přispěvatelé: | Karlsruhe Institute of Technology (KIT), Johannes Gutenberg - Universität Mainz (JGU), Chiba University, Karlsruher Institut für Technologie (KIT), Institut des Nanosciences de Paris (INSP), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie des nouveaux états quantiques (INSP-E2), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Fonds National de la Recherche Scientifique [Bruxelles] (FNRS) |
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Physics Magnetization dynamics Physics and Astronomy (miscellaneous) Condensed matter physics Field (physics) Texture (cosmology) Skyrmion 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Instability Magnetic field 0103 physical sciences [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] 0210 nano-technology Ground state ComputingMilieux_MISCELLANEOUS Topological quantum number |
| Zdroj: | Applied Physics Letters Applied Physics Letters, American Institute of Physics, 2020, ⟨10.1063/5.0013488⟩ |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | In this combined experimental and theoretical work, we report on the evolution of the skyrmion radius and its destruction in the system Co/Ru(0001) when an out-of-plane magnetic field is applied. At low fields, skyrmions are metastable and display an elliptical instability in which along the short axis, the spin texture approaches that of the spin-spiral phase and the long axis expands in order to go back to the spin-spiral ground state. At high fields, we observe round skyrmions of finite size up to the collapse field Bc, where they are destroyed and the topological charge is annihilated. We estimate Bc via numerical methods based on magnetization dynamics simulations parametrized by density functional theory calculations and compare it to experimental scanning tunneling microscopy observations obtained at ≈ 30 mK. |
| Databáze: | OpenAIRE |
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