High-sensitivity magnetorresistive magnetometer having laminated

Details High-sensitivity magnetorresistive magnetometer having laminated High-sensitivity magnetorresistive magnetometer having laminated

1991-07-30

1992-06-02

Wieder, Kenneth A.

Electricity: measuring and testing

Magnetic

Magnetometers

338 32R, 324260, 360113, G01R 3306

Patent

active

051190257

ABSTRACT:
A magnetometer includes a magnetoresistive element and first and second high-permeable laminated flux collectors of height H partially overlapping, respectively, opposing lateral edges of the magnetoresistive element, wherein the flux collectors are separated laterally by a gap of length G which the magnetoresistive element spans. The two laminated flux collector and the magnetoresistive element cooperatively form an open-loop flux-conducting path of total height 2H+G, that is capable of collecting flux of a magnetic field being measured and, in response to the flux collected, developing a magnetometive force across the gap G that is functionally related to the height of the flux collectors.

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Kwiatkowski et al, "The Permalloy Magnetoresistive Sensors--Properties and Applications", Jr. Phys. E: Sci. Instrum, vol. 19, (no month) 1986, (Gt. Brit.), pp. 502-515.
Gebhardt et al, "A magnetoresistive Permalloy Magnetic Field Sensor", Experimentelle Technik der Physik, vol. 30, (no month) 1982, pp. 363-367.

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