Vortex gyrotropic mode in curved nanodots
| Autor: | Michał Mruczkiewicz, J. Tóbik, K. Bublikov, Alexandr V. Sadovnikov |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Physics Condensed matter physics Oscillation Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Curvature 01 natural sciences Electronic Optical and Magnetic Materials Vortex Condensed Matter::Materials Science 0103 physical sciences Nano Nanodot Single domain 0210 nano-technology Lithography Spin-½ |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 537:168105 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2021.168105 |
| Popis: | In this work, we present the influence of the curvature of magnetic nanodot on the vortex gyrotropic mode frequency. We show that gyrotropic oscillation of the magnetic vortices is highly influenced by the rounding of the nanodot shape due to the formation of the apex and single domain state in the upper part of the dot. The curved shape of nanodot could arise during the fabrication process of the nanodots, i.e., during lithography. We find that strong dependence of the gyrotropic mode frequency on curvature parameter is related to magnetic phase transition: from vortex to out-of-plane state. The found effect can be used, e.g., for the design of the spin torque nano oscillators. |
| Databáze: | OpenAIRE |
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