Magnetic Anisotropy Energy in Nickel Arsenide Type Crystals

The theoretical consideration of the magnetic anisotropy energies of magnetic compounds with a nickel arsenide type crystal structure was made. The anisotropy energy due to the magnetic dipolar interaction for an appropriate spin structure in this crystal structure, and the one originating from the spin orbit interaction and the interaction related to this were studied assuming the ionic constitution of transition metal elements, from the stand point of one ion approximation. Some experimental data are explained the present theoretical results.