A vector magnetometer using a single Permalloy sensor with dual magnetic feedback

Author

Flynn, David

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

5038

Lastpage

5041

Abstract

Magnetic feedback fields, applied in both hard and easy axis directions of a Permalloy sensor biased with a sinusoidal hard axis field and offset, pulsed easy axis field, allow the magnitude and direction of both orthogonal components of an external field to be determined. The two outputs from the feedback circuit, corresponding to these two components, are independent of sensitivity variations due to bias or temperature changes. The feedback circuit and sensor is a first order system with a corner frequency to sinusoidal inputs proportional to the hard axis bias frequency

Keywords

Permalloy; circuit feedback; electric sensing devices; frequency response; magnetometers; dual magnetic feedback; feedback circuit; first order system; hard axis bias frequency; offset pulsed easy axis field; single Permalloy sensor; sinusoidal hard axis field; vector magnetometer; Bridge circuits; Feedback circuits; Frequency; Magnetic anisotropy; Magnetic sensors; Magnetometers; Magnetoresistance; Perpendicular magnetic anisotropy; Sensor phenomena and characterization; Temperature sensors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.334292

Filename

334292