  We report on atomic ordering of B-site transition-metals and magnetic
properties of epitaxial La2CrFeO6 double-perovskite films grown by pulsed-laser
deposition under various conditions. The highest ordered sample exhibited a
fraction of antisite-disorder of only 0.05 and a saturation magnetization of
~2\mu_{B} per formula unit at 5 K. The result is consistent with the
antiferromagnetic ordering of local spin moment
(3d^{3}_{\downarrow}3d^{5}_{\uparrow}; S = -3/2+5/2 = 1). Therefore, the
magnetic ground state of La2CrFeO6 double-perovskite that has been long debate
is unambiguously revealed to be ferrimagnetic. Our results present a wide
opportunity to explore novel magnetic properties of binary transition-metal
perovskites upon epitaxial stabilization of the ordered phase.
