Here, we report on the vdW epitaxy of the ferromagnetic metal Fe3GeTe2—a 2D crystal with tunable properties and great potential for room temperature ferromagnetism—via molecular beam epitaxy on a graphene/SiC(0001) template. Morphological and structural characterization confirmed the realization of large-area, continuous Fe3GeTe2/graphene heterostructure films with high structural and interface quality. Additionally, magneto-transport and X-ray magnetic circular dichroism investigations revealed a robust out-of-plane ferromagnetism in the films with a Curie temperature around 220 K, which is comparable to flakes exfoliated from state-of-the-art bulk single crystals. These results are highly relevant for further research on wafer-scale growth of vdW systems containing magnetic 2D crystals for the realization of multifunctional, atomically thin devices. By combining Fe3GeTe2 with other selected 2D crystals including TMDCs and h-BN, which can also be grown by precise methods such as MBE, we envision the realization of spintronic devices with dimensions and performance not achievable with conventional bulk materials.
|1||Autor||J. M. J. Lopes , D. Czubak , E. Zallo , A.I. Figueroa , C. Guillemard , M. Valvidares , J.R. Zuazo , J. López-Sanchéz , S.O. Valenzuela , M. Hanke , M. Ramsteiner|
Large-area van der Waals epitaxy and magnetic characterization of Fe 3 GeTe 2 films on graphene
|Source||2D Mater. , 8 , 041001 ( 2021 )|
: 10.1088/2053-1583/ac171d |
arxiv: arXiv:2104.09184 |