Regensburg 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 31: Poster II
MA 31.44: Poster
Mittwoch, 19. März 2025, 17:00–19:30, P1
Kerr Microscopy Studies of Magnetic Domains in proximity-coupled 3d FM-EuO Heterostructures — •Katharina Wehrstein, Seema Seema, Pia Maria Düring, and Martina Müller — FB Physik, Universität Konstanz, 78457 Konstanz
Europium monoxide (EuO) is a promising material for future spintronic applications as it is an insulator with a similar band gap to silicon, is ferromagnetic (FM) up to a Curie temperature (Tc) of 69 K and shows good spin-filter qualities. Since the low Tc is limiting for applications, methods to increase Tc are actively investigated. For this purpose, it is important to understand the magnetic behavior of EuO below, near and above Tc. One possible option to increase Tc is the proximity coupling of EuO with room temperature (RT) FM such as Fe or Co. Here, the temperature- and thickness-dependent magnetization of EuO thin films and 3d FM coupled EuO heterostructures synthesized by molecular beam epitaxy was investigated using magneto-optical Kerr microscopy. Systematic temperature- and thickness-dependent investigations on one hand revealed that the magnetic domain structure in Fe undergoes significant modifications in the presence of EuO, compared to Co. On the other hand, coercivity gets more affected due to the presence of Co than Fe. Such observations could lead to tuning thickness of EuO and overlayer choice in proximity-coupled heterostructures with Tc close to RT for applications.
Keywords: EuO; Kerr Microscopy; Proximity Effect; Magnetic Domains; Curie Temperature