Magnetism of L1(sub 0) compounds with the composition MT (M=Rh, Pd, Pt, Ir and T=Mn, Fe, Co, Ni)

Linear muffin-tin orbital calculations were used to examine the electronic band structure of ordered equiatomic compounds of 3d transition elements (Mn, Fe, Co, Ni) with nonmagnetic 4d and 5d elements (Rh, Pd, Pt, Ir). Mn spins in a given plane prefer to align antiferromagnetically as indicated by the pronounced negative exchange interactions between four Mn-Mn first nearest pairs, J(sub 11) observed in all Mn compounds.