Inverse Wiedemann Effect in glass-covered amorphous wires

We present results concerning the Inverse Wiedemann Effect (IWE) in Fe77.5S i7.5B15 amorphous glass-covered wires having 10-27 mu m and 5-15 mu m diame ters of the metallic core and thickness of the glass cover, respectively, a nd also on wires obtained after the glass removal. The dependence of the IW E voltage induced in the pick-up coil on torsion, tensile stress, and frequ ency of the ac current flowing through the wire are analysed. The amorphous wires were tested in the as-cast state and after heat treatments performed by current annealing technique, with and without applied torsion along the length of the wire. The obtained results show that the IWE voltage strongl y depends on the state of amorphous wires (as-cast or annealed). The work w as made in order to realise new sensor elements using glass-covered amorpho us wires. (C) 2000 Elsevier Science S.A. All rights reserved.