  Depositing magnetic insulators on graphene has been a promising route to
introduce magnetism via exchange proximity interaction in graphene for future
spintronics applications. Molecule-based magnets may offer unique opportunities
because of their synthesis versatility. Here, we investigated the magnetic
proximity effect of epitaxial iron phthalocyanine (FePc) molecules on
high-quality monolayer and bilayer graphene devices on hexagonal boron nitride
substrate by probing the local and non-local transport. Although the FePc
molecules introduce large hole doping effects combined with mobility
degradation, the magnetic proximity gives rise to a canted antiferromagnetic
state under a magnetic field in the monolayer graphene. On bilayer graphene and
FePc heterostructure devices, the non-local transport reveals a pronounced
Zeeman spin-Hall effect. Further analysis of the scattering mechanism in the
bilayer shows a dominated long-range scattering. Our findings in
graphene/organic magnetic insulator heterostructure provide a new insight for
the use of molecule-based magnets in two-dimensional spintronic devices.
