Reducing hysteresis in magnetostrictive-piezoelectric magnetic sensors

Author

Prieto, J.L. ; Aroca, C. ; López, E. ; Sánchez, M.C. ; Sánchez, P.

Author_Institution

Dept. de Fisica de Mater., Univ. Complutense de Madrid, Spain

Volume

34

Issue

6

fYear

1998

fDate

11/1/1998 12:00:00 AM

Firstpage

3913

Lastpage

3915

Abstract

In this paper, we present a method to avoid hysteresis in magnetostrictive-piezoelectric sensors. It is based on the application of an alternating magnetic field of a frequency different than the piezoelectric exciting frequency that supplies enough energy to overcome any domain wall pinning. The signal is filtered with a notch filter synchronized to the magnetic field frequency and thus it does not contribute to the useful response of the sensor. The results show an appreciable decrease in the magnetic hysteresis and also a small decrease in the sensitivity of the sensor

Keywords

magnetic field measurement; magnetic hysteresis; magnetic sensors; magnetostrictive devices; piezoelectric devices; alternating magnetic field; hysteresis; magnetic field frequency; magnetostrictive-piezoelectric magnetic sensors; notch filter; sensitivity; Amorphous magnetic materials; Frequency; Magnetic anisotropy; Magnetic field measurement; Magnetic hysteresis; Magnetic sensors; Magnetic separation; Magnetostriction; Perpendicular magnetic anisotropy; Saturation magnetization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.728303

Filename

728303