Regensburg 2025 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 31: Poster II
MA 31.46: Poster
Mittwoch, 19. März 2025, 17:00–19:30, P1
Antiferromagnetic coupling in Co/Au/Co tri-layers — Lokesh Rasabathina1, Rico Ehrler1, Markus Gößler1, Karin Leistner1, Georgeta Salvan1,2, and •Olav Hellwig1,2,3 — 1Chemnitz University of Technology, Chemnitz, Germany — 2Center for Materials, Architectures and Integration of Nanomembranes (MAIN), Chemnitz University of Technology,Chemnitz, Germany — 3Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Magnetic thin film systems are of great interest for many applications, such as magnetic memory, storage, sensor devices, etc. Specifically synthetic antiferromagnets (SAFs) with perpendicular magnetic anisotropy are of interest in the fabrication of nanomagnetic and spintronic devices[1]. In reference to earlier studies[2], we fabricate thin films consisting of Auseed/Co(1)/Auinterlayer/Co(2)/Aucap layer stack using magnetron sputtering in ultra-high vacuum conditions. Varying the Auinterlayer thickness the Co(1) and Co(2) layers either reverse separately at different switching fields or jointly at the same switching field. We investigate if the interaction between the two cobalt layers originates from RKKY coupling, orange-peel coupling or through growth induced asymmetry between the two cobalt layers[3]. The Auseed layer thickness also seems to affect the observed reversal behaviour. For our sample characterization, we use different types of magnetometry and magnetic microscopy techniques.
[1] R.A.Duine, et al., Nat. Phys. 14, 217 (2018)
[2] M. Matczak et al., J. Appl. Phys., vol. 114, no. 9 (2013)
[3] V. Grolier et al, Phys. Rev. Lett. 71, 3023 (1993)
Keywords: Magnetism; antiferromagnetic coupling; thin films