The effect of torsion and tensile stress on the circumferential permeability of CoFeBSi amorphous wires

In this paper, a domain model for the magnetoimpedance (MI) of ferromagnetic wires and complex inductance formalism are used to study both the effect of torsion and tensile stress on the low frequency MI response of CoFeBSi amorphous wires (60/spl mu/m of diameter). In particular, the calculated /spl mu//sub /spl phi// dependence on these kind of stresses is found to be very sensitive to the wire´s anisotropy constant K/sub a/ variations, exhibiting reduced L/sub r/ for diminished K/sub a/ and increasing L/sub r/ for increasing K/sub a/ is shown.