ANNEALING AND TORSION STRESS EFFECT ON MAGNETIC-ANISOTROPY AND MAGNETOSTRICTION OF VICALLOY FINE WIRE

A twisted semi-hard magnetic wire of Vicalloy with composition of Fe41 Co48V11 revealed remarkable uniaxial magnetic anisotropy along central axis direction of the wire and showed a defference in coercivity betw een enter shell and inner core of the mire. Also the wire remained the large torsion stress enough to generate the large Barkhausen jump, Th e magnitude of tile jump depends strongly on the magnetic characterist ics, such as magnetic anisotropy and magnetostriction constants, which may he varied with change of annealing treatment and torsion stress, In this study, the causes of large Barkhausen jump induced due to the stress remained by dice drawing process was investigated, As a result, it mas found that the pulse voltage induced in the wire was in propor tion to logarithmic two power of reduction.