The Curie temperature and magnetization of Fe-base amorphous binary alloys containing transition metal

Several kinds of Fe-base amorphous alloys with transition metals were prepared by means of a co-sputtering technique. The reduction of the magnetic moment of Fe-Ta and Fe-Nb amorphous alloys is much more pronounced than that of Fe-Hf and Fe-Zr amorphous alloys. Fe-Mo, Fe-V and Fe-W amorphous alloys are paramagnetic. The concentration dependence of the Curie temperature also exhibits a similar tendency. Such behavior can be explained by a d-band filling model. The magnetic-carrier ratio is larger than unity, indicating itinerant magnetic behavior. The reduced magnetization curves of the present alloys are flatter than those of crystalline Ni and Fe, and Co-base amorphous alloys.