Torsion and magnetic field measurements using inverse Wiedemann effect in glass-covered amorphous wires

This paper presents results concerning inverse Wiedemann effect (IWE) depen dence on the torsion and d.c. magnetic field applied along the length of th e Fe77.5Si7.5B15 glass-covered amorphous wires tested in the as-cast state both before and after glass removal. In the absence of torsion during measu rements, the IWE voltage is zero. Increasing the torsion value up to about 55 rad/m increases the value of the induced voltage until it reaches a maxi mum. In the 0.02-0.03 mT range there is a linear dependence of the IWE volt age on the d.c. magnetic field. The obtained results suggest the possibilit y of using Fe77.5Si7.5B15 glass-covered amorphous wires as sensing elements for torsion and magnetic field, based on the IWE. (C) 2000 Elsevier Scienc e S.A. All rights reserved.