Fig. 2: The magnetization easy axes and the MCA energy under strain.
From: Strain-induced magnetocrystalline anisotropy in L21 Co2FeSi: first-principles study

The magnetization easy axes depending on the strains within the (a) (001) and (b) (422) planes. The MCA energy EMCA per atom as a function of strains within the (c) (001) and (d) (422) planes.