Magnetic-moment distribution and superlattice dislocations in theL12-type structure

The transition of magnetic structure due to plastic deformation in the $L{1}_2$-type ordered alloys and compounds is explained in terms of the modified slip-induced directional-order model with consideration of magnetic interactions between the neighboring atoms. The environment of each atom after plastic deformation is elucidated. The change of the atomic environment on plastic deformation produces the magnetic transition from ferromagnetism to antiferromagnetism or vice versa. The magnetization of the plastically deformed alloys is formulated as the function of the dislocation density. Numerical estimates are given for the ${\mathrm{Pt}}_3$Fe, ${\mathrm{Pt}}_3$Co, ${\mathrm{Ni}}_3$Fe, and ${\mathrm{Ni}}_3$Mn alloys and for the ${\mathrm{Ni}}_3$Al intermetallic compound.