LARGE BARKHAUSEN EFFECT AND MATTEUCCI EFFECT IN AMORPHOUS MAGNETOSTRICTIVE WIRES FOR PULSE-GENERATOR ELEMENTS

The mechanisms producing the sensitive large Barkhausen effect and the Matteucci effect in as-prepared amorphous magnetostrictive wires are investigated using colloid technique domain observations and Sixtus-Tonks domain propagation characteristics. A theoretical analysis of the pulse height of induced voltage at the pick-up windings and between both ends of the wire is made. This analysis is compared with experimental results. The Matteucci effect was remarkably improved by twisting or by twisting and then annealing the as-prepared wires. Jitter-less pulse generation is realized in the latter case.