Figure 7
From: The role of faceting and elongation on the magnetic anisotropy of magnetite Fe3O4 nanocrystals
Plot of the aspect ratio dependence of the azimuthal (a) and rotational (b) energy barriers for different particle shapes and 6 nm particle size. For small elongations the azimuthal energy barrier rapidly increases and dominates over the rotational barrier arising from the cubic anisotropy. The rotational (cubic) character of the energy barrier along the energy minimum disappears for an elongation of 40% where only a uniaxial barrier remains.
