Abstract
The effect of stresses is known to modify the magnetic properties in magnetostrictive amorphous wires. A comparative study of the giant magnetoimpedance (GMI) for amorphous wires with compositions Fe 77.5Si 7.5B 15, Co 72.5Si 12.5B 15 and Co 68.15Fe 4.35Si 12.55B 15 and positive (30×10 −6), negative (−2×10 −6) and vanishing (0.1×10 −6) magnetostriction have been studied. The influence of torsional stress on hysteresis loops and GMI is also reported. Modifications of GMI response are ascribed to the magnetoelastic anisotropy induced by torsion.
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