Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 22: Thin Films: Coupling Effects and Exchange Bias
MA 22.2: Vortrag
Mittwoch, 20. März 2024, 10:00–10:15, H 2013
Magneto-Optic Kerr Effect in EuO and EuO/Co: Correlating Experiment and Simulations — •Seema Seema, Moumita Kundu, Henrik Jentgens, Paul Rosenberger, Ulrich Nowak, and Martina Müller — Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany
Ferromagnetic (FM) and insulating europium oxide (EuO) is perfectly suited as a spin-functional material for spintronic applications. EuO is a strong FM of 7µB with a Curie temperature (Tc) of 69 K. The latter limits the practical applications and thus pathways to enhance the Tc have been explored such as altering stoichiometry, doping etc. Alternatively, it is promising to explore EuO in proximity to a room temperature FM such as Fe or Co to realize an enhancement of Tc in EuO ultrathin films. The present work is the temperature-dependent magnetization in EuO probed using magneto-optic Kerr microscopy. Simultaneous hysteresis recording and domain imaging showed proximity effect-induced variations. To picture the magnetization reversal dynamics in EuO and EuO/Co, micromagnetic simulations were performed using OOMMF and MuMax3 and compared with the experimental findings below and above Tc. Examining the changes induced by the proximity effect on a micromagnetic scale, through both experimental studies and modeling, has the potential to advance the enhancement of the Tc of EuO.
Keywords: EuO; Proximity effect; Ferromagnet; Curie temperature; Hysteresis