Abstract
The authors report an amplified magneto-impedance (MI) in a laminated composite composed of a magnetostrictive terfenol-D plate and a Fe73.5Cu1Nb3Si13.5B9 ribbon that exhibits an intrinsic MI. When a dc magnetic field is applied to a laminated composite, the magnetostriction from the terfenol-D plate induces a giant stress that is simultaneously transferred to the ribbon, generating a stress-induced impedance (SI). Combining the terfenol-D magnetostriction and the SI of the ribbon produces an enhanced MI. The maximum MI ratio for the composite is ∼74%, which is ∼27 times higher than that for a single ribbon.
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