We find spontaneous ordering of B-site transition-metals in pulsed-laser deposited epitaxial La2CrFeO6 films. The highest ordered sample exhibits a fraction of antisite disorder of only 0.05 and a saturation magnetization of ~2mu_B per formula unit at 5 K. Magnetic ground state of this double perovskite that has been long debate is unambiguously revealed to be ferrimagnetic for the first time.
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