Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 35: Poster 2

MA 35.26: Poster

Donnerstag, 8. September 2022, 16:00–18:00, P4

Magneto-optical study of proximity effects at the EuO/Co interface — •David Mönkebüscher¹, Paul Rosenberger^{1, 2}, Davide Bossini^{1, 2}, Umut Parlak¹, Martina Müller², and Mirko Cinchetti¹ — ¹Department of Physics, TU Dortmund University, Germany — ²Department of Physics, University of Konstanz, Germany

Europium monoxide has shown great potential as a magnetic insulator and was succesfully employed in various spintronic applications as a spin filter with nearly 100% spin polarized currents [1]. For the use in practical applications, an increase of its relatively low Curie temperature (T_C = 69 K) is necessary. One approach relies on proximity effects, i.e. the coupling with a high T_C ferromagnetic layer [2]. Following this approach, we prepared YSZ/EuO/Co multilayers using molecular beam epitaxy (MBE) [3], and studied them using the magneto-optical setup described in Ref. [4]. First, we measured static hysteresis to gain insight about the nature of the proximity-induced coupling of the two magnetic sublattices. Then we used that the pump-probe experimental scheme to manipulate this coupling by varying the pump laser fluence and the delay between the pump and the probe beam.

[1] T. Santos et al., Phys. Rev B 69, 241202 (2004)

[2] S. Pappas et al. Sci Rep 3, 1333 (2013).

[3] P. Rosenberger et al. Phys. Rev. Mater. 6, 044404 (2022).

[4] F. Mertens et al. Rev. Sci. Instrum. 91, 113001 (2020).