Effects of thermal annealing on the magnetization dynamics of vitrovac amorphous ribbons

The effects of thermal annealing on the frequency behavior of the initial permeability of vitrovac amorphous ribbons were investigated. The results showed that annealing temperatures above the Curie point resulted in a large increase in the magnetization dynamics of the material. However, it also caused a decrease in the domain wall relaxation frequency. The relaxation frequency was proportional to the degree of pinning while permeability depended on the inverse.