Large-area van der Waals epitaxy and magnetic characterization of Fe3GeTe2 films on graphene. (11th August 2021)

• Record Type: Journal Article
• Authors: J Lopes, J Marcelo; Czubak, Dietmar; Zallo, Eugenio; Figueroa, Adriana I; Guillemard, Charles; Valvidares, Manuel; Rubio-Zuazo, Juan; López-Sanchéz, Jesús; Valenzuela, Sergio O; Hanke, Michael; Ramsteiner, Manfred
• Is Part Of: 2D materials. Volume 8:Number 4(2021)
• Publication Date: 2021-08-11
• Subjects: magnetic 2D materials -- van der Waals heterostructures -- van der Waals epitaxy -- molecular beam epitaxy -- ferromagnetism; Graphene -- Periodicals; Materials science -- Periodicals; Nanostructured materials -- Periodicals; 620.115
• DOI: 10.1088/2053-1583/ac171d
• Languages: English
• ISSNs: 2053-1583

Abstract

Abstract: Scalable fabrication of magnetic 2D materials and heterostructures constitutes a crucial step for scaling down current spintronic devices and the development of novel spintronic applications. Here, we report on van der Waals (vdW) epitaxy of the layered magnetic metal Fe3 GeTe2 (FGT)—a 2D crystal with highly tunable properties and a high prospect for room temperature ferromagnetism (FM)—directly on graphene by employing molecular beam epitaxy. Morphological and structural characterization confirmed the realization of large-area, continuous FGT/graphene heterostructure films with stable interfaces and good crystalline quality. Furthermore, magneto-transport and x-ray magnetic circular dichroism investigations confirmed a robust out-of-plane FM in the layers, comparable to state-of-the-art exfoliated flakes from bulk crystals. These results are highly relevant for further research on wafer-scale growth of vdW heterostructures combining FGT with other layered crystals such as transition metal dichalcogenides for the realization of multifunctional, atomically thin devices.