Tunable magnetic vortex resonance in a potential well
| Autor: | Laura J. Heyderman, Peter Warnicke, Jörg Raabe, Stephanie E. Stevenson, Phillip Wohlhüter, A. K. Suszka |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Permalloy Condensed matter physics Resonance 02 engineering and technology 021001 nanoscience & nanotechnology Magnetostatics 01 natural sciences Blueshift Vortex Core (optical fiber) Ferromagnetism Condensed Matter::Superconductivity Excited state 0103 physical sciences 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review B. 96 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | We use frequency-resolved x-ray microscopy to fully characterize the potential well of a magnetic vortex in a soft ferromagnetic permalloy square. The vortex core is excited with magnetic broadband pulses and simultaneously displaced with a static magnetic field. We observe a frequency increase (blueshift) in the gyrotropic mode of the vortex core with increasing bias field. Supported by micromagnetic simulations, we show that this frequency increase is accompanied by internal deformation of the vortex core. The ability to modify the inner structure of the vortex core provides a mechanism to control the dynamics of magnetic vortices. |
| Databáze: | OpenAIRE |
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