On the magnetic and magnetoelastic uniformity measurements on Fe78Si7B15 amorphous ribbons and wires

In this paper we present new results on magnetic and magnetoelastic uniformity measurements on Fe78Si7B15 amorphous ribbons and wires. The measurements are performed using an automatic instrumentation device based on the magnetostrictive delay line technique, with the ability to determine the B(H) and lambda(H) functions along the length of a ribbon with parametric control of field and frequency. According to these results, it has been determined that magnetic and magnetoelastic uniformity functions are subject to the history of the under test samples.