  We investigate MCA of CoFe(011) thin films as a function of strength of
strain and film thickness has been studied. It is elucidated that perpendicular
magnetocystalline anisotropy (MCA) energy (EMCA) is getting stronger with
compressed xy-plane lattice constant while in-plane MCA is become an easy-axis
by tensile strain on xy-plane. The reason of the EMCA behaviors can be
explained by features of electronic structures.
