Theoretic studies on the magnetic anisotropy of rare-earth transition-metal thin films

The magnetic anisotropy of rare-earth transition-metal thin films is investigated in this paper.Based on the reference review and the analysis of thin film forming process by sputtering,the single ion model has been put foreword.With concrete computation,we found that when the composition of the film is R31Co69 and the rare-earth element is Tb,the magnetic anisotropy value can be as high as 3.1×106 erg/cm3.And the Coulomb interactions between the non-S state rare-earth ion in non-spherical electric charge distribution with the deformed local crystalline field accounts for the major source of high perpendicular anisotropy of TbCo amorphous films.