Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 68: Poster 5
MA 68.23: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-OG4
Discrete magnetic layer-by-layer switching in antiferromagnetically coupled Fe/MgO(001) superlattices — •Tobias Warnatz1, Fridrik Magnus2, Gunnar K. Palsson1, Vassilios Kapaklis1, Victor Ukleev1,3, Reda Moubah4, Anton Devishvili1, Justinas Palisaitis5, Per O. Å. Persson5, and Björgvin Hjörvarsson1 — 1Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden — 2Science Institute, University of Iceland, Reykjavik, Iceland — 3RIKEN Center for Emergent Matter Science, Wako-shi, Japan — 4Faculté des Sciences, Université Hassan II-Casablanca, Casablanca, Morocco — 5Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
Multilayer structures with an insulating spacer layer are widely studied due to their huge tunnel-magnetoresistance. However, it is less well known (and studied) that such structures can also exhibit an interlayer exchange coupling (IEC), when prepared with a high crystalline quality. Here, we present a discrete layer-by-layer magnetic switching in Fe/MgO(001) superlattices of 10 repetitions with an antiferromagnetic IEC [1]. The structures were prepared via sputtering and the crystalline quality and layering was investigated via x-ray diffraction and reflectivity, respectively as well as via transmission electron microscopy. The magnetic properties were studied via the longitudinal magneto-optical Kerr effect as well as with polarized neutron reflectivity.
[1] R. Moubah, F. Magnus, T. Warnatz, et al. Phys. Rev. Applied 5, 044011 (2016).