Spin distribution in plastically deformed Fe - Al intermetallic compounds

The influence of plastic deformation on the magnetic properties has been studied in Fe - Al intermetallic compounds with composition between 30 and 40 at.% Al. The spontaneous magnetization, , increases considerably as a result of plastic deformation between 30 and 34 at.% Al concentration. The Fe - Al compounds containing between 35.0 and 50.0 at.% Al are paramagnetic before plastic deformation and as a result of plastic deformation the magnetic susceptibility increases remarkably. At the same time appears. The ferromagnetic clusters are induced by plastic deformation along the antiphase boundary (APB) ribbons between superpartial dislocations. The cluster along the APB ribbon shows a strong anisotropy whose easy direction of magnetization is within the glide plane. The easy direction of magnetization is consistent with that of the roll-induced anisotropy in alloys. The origin of the spin glass in these compounds is explained by the magnetic anisotropy depending on the atomic arrangement. The conditions of the transition to the ferromagnetic state are discussed.