Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 59: Posters Magnetism III
MA 59.28: Poster
Friday, March 20, 2020, 09:00–12:00, P2/EG
Manipulation of laterally homogeneous vertical AF domain walls in Synthetic Antiferromagnets with Perpendicular Magnetic Anisotropy — •Benny Böhm1, Lorenzo Fallarino2 und Olav Hellwig1,2 — 1Institute of Physics and MAIN, Chemnitz University of Technology, Germany — 2Helmholtz-Zentrum Dresden-Rossendorf, Germany
Antiferromagnets (AFs) are of emerging interest due to their wide variety of useful properties at the micro and nanoscale. Despite the macroscopically vanishing magnetic remanent moment and therefore high stability with respect to external magnetic field, AFs may provide other unique magnetic static states as well as promising characteristics for dynamic applications like high domain wall velocities and excitation frequencies into the THz regime.
Synthetic antiferromagnets (SAFs), consisting of AF-coupled ferromagnetic layers via thin non-magnetic spacer layers, maintain the main characteristics of intrinsic AFs. Additionally, SAFs offer a high degree of tunability and easy integration, thus making them interesting for a wide range of applications.
One unique AF phenomenon, which can be efficiently observed in SAFs, is the Surface Spin Flop (SSF). During the SSF-reversal, a laterally homogeneous vertical AF domain is nucleated. Combining the SAF with perpendicular magnetic anisotropy allows to easily manipulate even locally the films magnetic properties. Thereby, the vertical AF domain wall can be stabilized even at remanence, allowing to choose between multiple coexisting remanent states.