Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 65: Poster 2
MA 65.15: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-OG1
FMR identification of skyrmionic states in confined helimagnetic nanostructures — •Marijan Beg1, David I. Cortés-Ortuño1, Weiwei Wang1,2, Rebecca Carey1, Mark Vousden1, Ondrej Hovorka1, and Hans Fangohr1 — 1Faculty of Engineering and the Environment, University of Southampton, Southampton, SO17 1BJ, United Kingdom — 2Department of Physics, Ningbo University, Ningbo, 315211, China
One of the challenges in the study of skyrmionic states in confined helimagnetic nanostructures is the detection of which state emerged in the studied sample. In this work, we explore how measuring resonance frequencies can contribute to the identification of the emergent state. We compare the power spectral densities of an incomplete Skyrmion (iSk) (also called the quasi-ferromagnetic or edged vortex state) and isolated Skyrmion (Sk) states in a 100 nm diameter FeGe disk sample with 10 nm thickness at different external magnetic field values using our full three-dimensional micromagnetic model. In this sample size and at all simulated external magnetic field values, the Sk state is metastable and the iSk state is the ground state. We discuss the comparison between iSk and Sk power spectral densities and observe several key differences in power spectral densities that can contribute to the experimental identification of the state present in the studied sample by measuring the resonance frequencies. This work was supported by the EPSRC’s EP/G03690X/1 and EP/N032128/1 grants and the Horizon 2020 European Research Infrastructure project (676541).