Abstract
Co 79.6 Fe 4.6 Si 9.2 B 2.7 Mo 3.9 fibers have been produced by the modified process of melt-extraction. Hysteresis loop, magnetostriction constant, λ s and giant magneto-impedance (GMI) ratio (total impedance, real and imaginary contributions) of such fibers have been measured. Studied fibers exhibit excellent magnetic softness (coercivity about 20 A m −1 ), small positive magnetostriction constant ( λ s ≈1.13×10 −6 ) and GMI ratio of the order of 50% in as-cast state. Current annealing has been employed to tailor the magnetic properties and GMI effect of these fibers.
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