Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 67: Poster 4
MA 67.19: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-OG3
Time-resolved scanning electron microscopy with polarization analysis — •Fabian Kloodt1, Robert Frömter1,2, Philipp Staeck1, Axel Frauen1, Susanne Kuhrau1, and Hans Peter Oepen1,2 — 1Institut für Nanostruktur- und Festkörperphysik, Universität Hamburg, Jungiusstraße 11, 20355 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany
We demonstrate the feasibility of investigating periodically driven magnetization dynamics in a scanning electron microscope with polarization analysis based on spin-polarized low-energy electron diffraction [1]. With the present setup [2], analyzing the time structure of the scattering events, we obtain a temporal resolution of 700 ps, which is demonstrated by means of imaging the field-driven 100 MHz response of a vortex in a soft-magnetic FeCoSiB square. Owing to the efficient intrinsic timing scheme, high-quality movies, giving two components of the magnetization simultaneously, can be recorded on the time scale of hours. The present state of the method, limitations and the development potential will be discussed.
[1] R. Frömter, Appl. Phys. Lett. 108, 142401 (2016).
[2] R. Frömter, Rev. Sci. Instrum. 82, 033704 (2011).