Magnetic anisotropy was studied in a monocrystalline, epilayer of magnesium ferrite. This epilayer, 1.2 &mgr;m thick, was prepared by CVD on /100/ cleavage surfaces of MgO substrates at 1550 °K. Anisotropy measurements were performed by FMR and torque methods at room temperature. The parameters characterizing this epilayer are: 4&pgr;M=1650 G, K1=−3.2×104ergs/cc, Kn=1.2×105ergs/cc and a quality factor q=1.1.