Structural, chemical, and magnetic investigation of a graphene/cobalt/platinum multilayer system on silicon carbide

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dc.contributor.authorWeinert, Philipp
dc.contributor.authorHochhaus, Julian
dc.contributor.authorKesper, Lukas
dc.contributor.authorAppel, Robert
dc.contributor.authorHilgers, Stefanie
dc.contributor.authorSchmitz, Marie
dc.contributor.authorSchulte, Malte
dc.contributor.authorHönig, Richard
dc.contributor.authorKronast, Florian
dc.contributor.authorValencia, Sergio
dc.contributor.authorKruskopf, Mattias
dc.contributor.authorChatterjee, Atasi
dc.contributor.authorBerges, Ulf
dc.contributor.authorWestphal, Carsten
dc.date.accessioned2025-09-25T05:49:14Z
dc.date.available2025-09-25T05:49:14Z
dc.date.issued2024-02-21
dc.description.abstractWe 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.en
dc.identifier.urihttp://hdl.handle.net/2003/43996
dc.language.isoen
dc.relation.ispartofseriesNanotechnology; 35(16)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectEpitaxial grapheneen
dc.subjectMetal intercalationen
dc.subjectX-ray photoemission electron microscopyen
dc.subjectMagnetic imagingen
dc.subjectDzyaloshinskii–Moriya interactionen
dc.subjectGraphene-ferromagnet interfaceen
dc.subject.ddc530
dc.titleStructural, chemical, and magnetic investigation of a graphene/cobalt/platinum multilayer system on silicon carbideen
dc.typeText
dc.type.publicationtypeArticle
dcterms.accessRightsopen access
eldorado.doi.registerfalse
eldorado.secondarypublicationtrue
eldorado.secondarypublication.primarycitationWeinert, P., Hochhaus, J., Kesper, L., Appel, R., Hilgers, S., Schmitz, M., Schulte, M., Hönig, R., Kronast, F., Valencia, S., Kruskopf, M., Chatterjee, A., Berges, U., & Westphal, C. (2024). Structural, chemical, and magnetic investigation of a graphene/cobalt/platinum multilayer system on silicon carbide. Nanotechnology, 35(16), Article 165702. https://doi.org/10.1088/1361-6528/ad1d7b
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.1088/1361-6528/ad1d7b

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