Fig. 4: Magnetocrystalline anisotropy energy surfaces.
From: Superstructure magnetic anisotropy in Fe3O4 nanoparticle chains
Energy surface for the cubic Fe3O4 phase (a) and for the orthorhombic phase (b). The color and shape denote the energy required to rotate the magnetization in the respective direction. Please note the different scale of the two plots.
