Abstract
The skin penetration depth of Fe-rich wires is obtained in this work, from the impedance measurements, as a function of applied magnetic field and torsional stress. The Fe 73.5Si 13.5B 9Nb 3Cu 1 wires have been submitted to different annealing treatments in order to get the softest magnetic behaviour in the nanocrystalline state. A decrease in electrical resistivity and improvement of the soft magnetic properties of the wire annealed at 565 °C is observed. Changes in skin penetration depth of up to 36 μm are achieved with a small torsion in the nanocrystallized wire. Results can be understood by the dependence of permeability on applied magnetic field and torsional stresses.
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