Keywords:magnetic proximity effect, graphene, magnetoelectrics
In our study, we have investigated the signatures of spin transport in heterostructures formed from CVD-graphene and chromia (Cr2O3). Chromia is an insulating magneto-electric, exhibiting antiferromagnetic character in bulk up to an elevated Neel temperature of 307 K. Recently, however, it has been demonstrated that the (0001) surface of this material exhibits the phenomenon of boundary magnetism. The magneto-electric nature of the chromia allows the direction of the net magnetism at this surface to be reversed electrically, by application of an appropriate voltage in the simultaneous presence of magnetic field and with low power dissipation. As a substrate, chromia offers room-temperature control of magnetic proximity effects in graphene, in marked contrast to previously reported ferromagnetic insulators.