Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 54: Magnetic textures: Transport and dynamics III
MA 54.10: Vortrag
Freitag, 5. April 2019, 12:00–12:15, H37
Dynamics of confined magnetic skyrmions under application of an oscillatory magnetic field — •Sakineh Abdizadeh Kalan1,2, Jahanfar Abouie1, and Khalil Zakeri Lori2 — 1Institute for Advanced Studies in Basic Sciences(IASBS), Zanjan 45137-66731, Iran — 2Heisenberg Spin-dynamics Group, Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, D-76131 Karlsruhe, Germany
We report a detailed micromagnetic study of the dynamics of a magnetic skyrmion confined in a 120-nm-diameter disk of 0.6 nm thickness, using the Object Oriented Micromagnetic Framework (OOMMF). We observe that the dynamics depends on the frequency as well as the amplitude of the applied magnetic field, as expected. Our results indicate that there is a threshold field amplitude above which the dynamics becomes more complex. In the second step, the gyroscopic motion of field-driven skyrmion is investigated by analytical calculations. We use the Thiele equation for massive skyrmions in the presence of a magnetic field. The time dependent trajectory of skyrmion core is analytically calculated for different magnetic fields and different field geometries. Comparing the results of micromagnetic simulations to those of the analytical calculations, we discuss the details of the observed complex skyrmion dynamics.
The work has been supported by the Deutscher Akademischer Austauschdienst (DAAD) and the Deutsche Forschungsgemeinschaft (DFG) through the DFG grants ZA 902/3-1 and ZA 902/4-1.