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MA: Fachverband Magnetismus

MA 50: Magnetic Domain Walls (non-skyrmionic)

MA 50.5: Vortrag

Freitag, 31. März 2023, 10:30–10:45, POT 6

Magneto-Optic Effects and Domain Imaging in EuO film and EuO/Co Heterostructure — •Seema Seema¹, Henrik Jentgens¹, Paul Rosenberger^{1, 2}, and Martina Müller¹ — ¹Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany — ²Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany

Ferromagnetic semiconductors and stable half-metallic ferromagnets with Curie temperatures (Tc) equal to or more than room temperature have been sought for their applications in novel spintronic devices. Europium oxide (EuO) is one of the potential candidates as it possesses strong ferromagnetism (FM) of 7 μB with a Tc of 69 K. The present work focuses on the magnetization reversal mechanisms and domain images in EuO probed using magneto-optic Kerr microscopy. We aimed to visualize magnetic proximity effect induced changes in the coercivity of hysteresis loops as well as magnetic domains in EuO film and in a EuO/3d-FM heterostructure. We synthesized EuO/Co heterostructure sample using molecular beam epitaxy on Nb:STO and observed the differences in the domain saturation behavior as well as the Kerr rotation below Tc. This had been performed by magnetic hysteresis measurement along with simultaneous domain imaging using a Kerr microscope. To explore the temperature-dependent magneto-optic effects in EuO in the proximity of Co, we measured hysteresis at various temperatures below and above Tc. This study of proximity effect-induced changes in magnetic domains in EuO due to Co can provide insights into achieving room-temperature FM in EuO.