Regensburg 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 55: Electron theory and micromagnetism
MA 55.12: Vortrag
Freitag, 5. April 2019, 12:30–12:45, H38
Micromagnetic simulations for static and dynamic characterization of a linear chain of 20 magnetite nanoparticles — •Thomas Feggeler1, Benjamin Zingsem1,2, Alexandra Terwey1, Michael Winklhofer3, Ralf Meckenstock1, Michael Farle1, Heiko Wende1, and Katharina Ollefs1 — 1Faculty of Physics and CENIDE, University Duisburg-Essen, Lotharstr. 1, 47057 Duisburg — 2Ernst Ruska Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany — 3School of Mathematics and Science, University of Oldenburg, 26129 Oldenburg, Germany
We simulated the angular dependent Ferromagnetic Resonance (FMR) of a chain of 20 cubic magnetite nanoparticles (30 nm x 30 nm x 30 nm, truncated edges), resembling a particle chain within a bacterium Magnetospirillium Gryphiswaldense (strain MSR-1, wild-type). A simulated external magnetic field has been rotated 180 degrees in-plane around the chain, varying the field strength from 450 mT to 50 mT at each angle. In the simulated angle dependent Ferromagnetic Resonance spectrum multiple angular dependent resonance lines are visible, indicating an angular dependent anisotropy with a periodicity of 180 degrees, which is in good agreement to the experimental FMR measurements on such a sample. By the help of the simulation it is possible to identify the parts of the particle chain, in which each resonant eigenstate is localized. Partial financial support by DFG Project: OL513/1-1 is acknowledged.