We report the magnitude of the induced magnetic moment
in CVD-grown
epitaxial and rotated-domain graphene in proximity with a ferromagnetic
Ni film, using polarized neutron reflectivity (PNR) and X-ray magnetic
circular dichroism (XMCD). The XMCD spectra at the CK-edge confirm the presence of a magnetic signal in the graphene layer,
and the sum rules give a magnetic moment of up to ∼0.47 μB/C atom induced in the graphene layer. For a more precise
estimation, we conducted PNR measurements. The PNR results indicate
an induced magnetic moment of ∼0.41 μB/C atom
at 10 K for epitaxial and rotated-domain graphene. Additional PNR
measurements on graphene grown on a nonmagnetic Ni9Mo1substrate, where no magnetic moment in graphene is measured,
suggest that the origin of the induced magnetic moment is due to the
opening of the graphene’s Dirac cone as a result of the strong
C pz-Ni 3d hybridization.