Exploring Proximity-Induced Ferromagnetism in Graphene/Cr$_{2}$Ge$_{2}$Te$_{6}$ Heterostructures

Due to its tunability and high electron mobility, graphene is a promising platform for spintronics. While isolated graphene is non-magnetic, ferromagnetism can be induced by controlling its local environment. Through proximity effects, 2D materials are known to inherit order parameters from a substrate when the two are placed in intimate contact. Proximity-induced ferromagnetism has been seen in graphene/yttrium iron garnet (YIG) heterostructures. Several other ferromagnetic insulators could be used instead. Unlike YIG, Cr$_{2}$Ge$_{2}$Te$_{6}$ (CGT) is a layered ferromagnetic insulator which makes it an ideal candidate substrate to produce ferromagnetism in graphene while maintaining its high electron mobility. Here we study proximity-induced ferromagnetism in graphene placed on exfoliated flakes of CGT. CGT is unfortunately sensitive to air, a major challenge for making a clean interface. Therefore, we measured graphene/CGT heterostructures fabricated in a controlled environment.