Fig. 3: MAE (in μeV Cr−1) of CrGe2Se3 as a function of the ferromagnetic direction.
From: Rotational magnetoelectric switching in orthorhombic multiferroics

a MAE for ferromagnetic direction in the ab plane. b MAE for ferromagnetic direction in the three-dimensional space. The energy of ferromagnetic direction along the (a) direction is set to zero.