  We calculate the temperature dependent long-range magnetic coupling in the
presence of dilute concentrations of random magnetic impurities in chiral
multilayer two-dimensional semimetals, i.e., undoped intrinsic multilayer
graphene. Assuming a carrier-mediated indirect RKKY exchange interaction among
the well-separated magnetic impurities with the itinerant carriers mediating
the magnetic interaction between the impurities, we investigate the magnetic
properties of intrinsic multilayer graphene using an effective chiral
Hamiltonian model. We find that due to the enhanced density of states in the
rhombohedral stacking sequence of graphene layers, the magnetic ordering of
multilayer graphene is ferromagnetic in the continuum limit. The ferromagnetic
transition temperature is calculated using a finite-temperature self-consistent
field approximation and found to be within the experimentally accessible range
for reasonable values of the impurity-carrier coupling.
