Title :
Amorphous wire magnetic field and DC current sensor based on the inverse Wiedemann effect
Author :
Pulido, E. ; del Real, R.P. ; Conde, F. ; Rivero, G. ; Vázquez, M. ; Ascasibar, E. ; Hernando, A.
Author_Institution :
Inst. de Magnetismo Aplicado, Univ., Complutense, Madrid, Spain
fDate :
11/1/1991 12:00:00 AM
Abstract :
A magnetic field sensor is presented which is based on the inverse Wiedemann effect (IWE) on amorphous wires. The external magnetic DC field to be detected changes the time symmetry of the output voltage induced in a pick-up coil, creating even harmonics. Measurement results show important advantages in sensitivity and working frequencies mainly due to the core´s geometry. The sensor has outstanding sensitivity for magnetic fields below 0.02 mT, as well as a low working frequency and current intensity
Keywords :
Wiedemann effect; electric sensing devices; magnetic field measurement; magnetic properties of amorphous substances; magnetostrictive devices; metallic glasses; DC current sensor; amorphous wires; even harmonics; inverse Wiedemann effect; low working frequency; magnetic field sensor; metallic glasses; pick-up coil; sensitivity; Amorphous magnetic materials; Amorphous materials; Coils; Frequency measurement; Geometry; Magnetic cores; Magnetic field measurement; Magnetic sensors; Voltage; Wire;
Journal_Title :
Magnetics, IEEE Transactions on
