Regensburg 2019 – wissenschaftliches Programm
MA 7.3: Vortrag
Montag, 1. April 2019, 15:45–16:00, H37
Diversity of magnetic phases occuring in perpendicular synthetic antiferromagnets — •Leopold Koch1, Fabian Samad1, Benny Böhm1, Sven Stienen2, Pierre Pudwell1, and Olav Hellwig1, 2 — 1Technische Universität Chemnitz, Reichenhainer Straße 70, 09126 Chemnitz — 2Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden
Magnetic domain formation in synthetic antiferromagnets (SAF) consisting of layered thin films with perpendicular magnetic anisotropy and thin non-magnetic interlayers is determined by magnetic energies like interlayer exchange, interfacial anisotropy and demagnetization. The competitive character of the energies leads to a variety of stable magnetic configurations with characteristic domain patterns. We show that the energies depend on specific system parameters like films thicknesses or number of repeats and can therefore be easily controlled via the design of the multilayer. Furthermore, we show that also ex-situ manipulation like (focused) ion beam irradiation leads to a transition of the magnetic phases which provides a possibility to create lateral heterogeneous magnetic nanostructures.
Since the domain structures are highly reproducible and even compatible with amorphous substrates, the presented SAFs are suitable for a wide variety of applications.