Weinert, PhilippHochhaus, JulianKesper, LukasAppel, RobertHilgers, StefanieSchmitz, MarieSchulte, MalteHönig, RichardKronast, FlorianValencia, SergioKruskopf, MattiasChatterjee, AtasiBerges, UlfWestphal, Carsten2025-09-252025-09-252024-02-21http://hdl.handle.net/2003/43996We investigate the magnetic interlayer coupling and domain structure of ultra-thin ferromagnetic (FM) cobalt (Co) layers embedded between a graphene (G) layer and a platinum (Pt) layer on a silicon carbide (SiC) substrate (G/Co/Pt on SiC). Experimentally, a combination of x-ray photoemission electron microscopy with x-ray magnetic circular dichroism has been carried out at the Co L-edge. Furthermore, structural and chemical properties of the system have been investigated using low energy electron diffraction (LEED) and x-ray photoelectron spectroscopy (XPS). In situ LEED patterns revealed the crystalline structure of each layer within the system. Moreover, XPS confirmed the presence of quasi-freestanding graphene, the absence of cobalt silicide, and the appearance of two silicon carbide surface components due to Pt intercalation. Thus, the Pt-layer effectively functions as a diffusion barrier. The magnetic structure of the system was unaffected by the substrate’s step structure. Furthermore, numerous vortices and anti-vortices were found in all samples, distributed all over the surfaces, indicating Dzyaloshinskii–Moriya interaction. Only regions with a locally increased Co-layer thickness showed no vortices. Moreover, unlike in similar systems, the magnetization was predominantly in-plane, so no perpendicular magnetic anisotropy was found.enNanotechnology; 35(16)https://creativecommons.org/licenses/by/4.0/Epitaxial grapheneMetal intercalationX-ray photoemission electron microscopyMagnetic imagingDzyaloshinskii–Moriya interactionGraphene-ferromagnet interface530Article