Co-Zr非晶薄膜的磁感生各向异性

利用射频溅射法制得的Co₉₁Zr₉和Co₈₆Zr₁₄两种成分的样品,对其感生各向异性在等温退火时的再取向作了详细研究。发现其热稳定性随含Zr量的增加而提高,求得其激活能分别为1.7eV和2.5eV。并对其感生各向异性随含非磁性金属原子的增加而下降的现象给出一个新解释。 关键词：

INDUCED ANISOTROPY IN Co-Zr AMORPHOUS FILMS

The thermal stability of the uniaxial anisotropies in Co₈₆ Zr₁₄ and Co₉₁ Zr₉ amorphous films prepared by rf sputtering are investigated through isothermal annealing in a static magnetic field. It is found that the stability is improved with increasing content of Zr. The relaxation curves have been fitted with calculated ones assuming the lognormal distribution of activation energy. The mean value of activation energy has been estimated at 2.5 eV for Co₈₆ Zr₁₄ and 1.7 eV for Co₉₁ Zr₉ films, respectively. The anisotropy increases with decreasing metal content, that can be explained by the precipitation caused by the nonmagnetic interaction in amorphous alloys.