TbCo amorphous films with or without Cr underlayer were prepared by no -bias magnetron sputtering method. And the origin of the perpendicular magnetic anisotropy in these films was studied. Theoretic analysis showed that the main origin of the perpendicular magnetic anisotropy in TbCo amorphous films are the coulomb interaction between the aspheric distribution charges of Tb ions and the crystal field and the stress of the film. SEM micrographs showed that a columnar structure existed in TbCo films with Cr underlayer. It is considered that the columnar s...
