Regensburg 2019 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 24: Thin Film Properties: Structure, Morphology and Composition (XRD, TEM, XPS, SIMS, RBS, AFM, ...) Part I

DS 24.1: Vortrag

Donnerstag, 4. April 2019, 15:00–15:15, H39

Magnetic skyrmions in FeGd multilayer thin films — •Zahra Inanloo Maranloo¹, Michael Heigl², Henrik Gabold¹, Georg Benka¹, Manfred Albrecht², and Peter Böni¹ — ¹Physics Department E21, Technical University of Munich, 85748 Garching, Germany — ²Experimental Physics IV, Institute of Physics, University of Augsburg, 86159 Augsburg, Germany

Magnetic skyrmions are topological magnetic entities that are observed in an increasing number of bulk and thin film systems[1]. Fe/Gd multilayers, in which Fe and Gd are antiferromagnetically coupled, are of high interest because they can form skyrmions at room temperature[2].

In this project, the magnetic structure of multilayers [Fe(0.34nm)/Gd(d)]*80 with d=0.35 nm, 0.40 nm, 0.45 nm have been investigated. The magnetic properties have been tuned by varying the thickness of the Gd layers in order to study how the expected skyrmion phase will be affected and changed. The structure and morphology were studied by X-ray reflectivity measurements. We will show measurements of magnetic hysteresis loops and topological Hall effect that can be used to identify the shift of the skyrmion phase with respect to the temperature and magnetic field. Finally, the process of the magnetic domain evolution at zero and different in-plane and out-of-plane applied magnetic fields will be discussed on the basis of results using magnetic force microscopy.

Reference

[1]W. Jiang, et. al., Physics Reports 704(2017).

[2]S. A. Montoya, et. al., Phys. Rev. B 95, 024415(2017).