LARGE BARKHAUSEN AND MATTEUCCI EFFECTS IN FECOSIB, FECRSIB, AND FENISIB AMORPHOUS WIRES

The mechanism of sensitive and stable large Barkhausen effect of as-cast amorphous magnetostrictive wires having three composition systems was investigated using measured values of stress induced anisotropy constant Ku, saturation magnetostriction λ, residual internal stress or, and MH hysteresis loop squareness Mr/Ms. The entire composition range of FeCo is compared to FeCr with up to 10 at. % and FeNi with Ni up to 12 at. %. Matteucci effects were also investigated in magnetostrictive and non-magnetostrictive amorphous wires magnetized with a longitudinal ac field, ac wire current, or ac field perpendicular to the wire axis. © 1990 IEEE