D.C. magnetic field measurements based on the inverse Wiedemann effect in Fe-rich glass covered amorphous wires

摘要

Results concerning the dependence of the inverse Wiedemann effect (IWE) voltage in Fe/sub 77.5/Si/sub 7.5/B/sub 15/ glass covered amorphous wire on the external DC magnetic field are presented. In the 0.01-0.015 mT and 0.02-0.03 mT ranges for torsion annealed and as-cast wires, respectively, there is a linear dependence of the IWE voltage on the DC magnetic field. The response sensitivity increases up to about 19 V/mT when the AC current frequency increases up to about 3 kHz. DC magnetic field sensing elements, based on the IWE effect, having small dimensions, very good mechanical and corrosion resistance can be realized using glass covered amorphous wires.