We have theoretically investigated the chemical order parameter (S) dependence of magnetocrystalline anisotropy energy (MAE) of L10-type alloys by means of the second-order perturbation in terms of the spin-orbit interaction (SOI) combined with the coherent potential approximation. Using some approximations, we obtained MAE ∝ S2 as well as the directional-order-induced magnetic anisotropy resulting from dipole-dipole interactions. The common feature that leads to this relation is the two-site interactions that reflect the polarity of atomic arrangements in the both anisotropy energies resulting from the SOI and the dipole-dipole interactions. In the case of MAE resulting from SOI, some approximations are needed owing to the presence of electron itineracy, which is neglected in the conventional scenario of directional-order-induced magnetic anisotropy.
ASJC Scopus subject areas
- Physics and Astronomy(all)