Magnetic Induction Effect of Rare-Earth La Modified Fe₇₈Si₉B₁₃ Amorphous Ribbons

The rare-earth element La modified amorphous ribbon was prepared by doping rare-earth La in Fe78Si9B13 amorphous alloy. The influences of rare-earth content and annealing temperature on the magnetic induction effect and its amplitude were investigated. The results show that the magnetic induction effect first increased and then decreased with the increase of rare-earth content when the magnetic field strength was less than 1 356 A·m-1, but the rare-earth content had little influence when the magnetic field strength was greater than 1 356 A·m-1. The changing amplitude of magnetic induction effect showed a trend of first increasing and then decreasing with rare-earth content increasing, and had the maximum at 0.6 wt%. With the increase of annealing temperature, the changing amplitude of magnetic induction effect first increased and then decreased, and had the maximum at the annealing temperature of 300 ℃.