Sensor saturation for hysteresis reduction in GMR magnetometers

Philip S. Mease; Robert R. Krchnavek; Jacob T. Kephart; Peter Ferrara

doi:https://doi.org/10.1109/SAS.2010.5439400

Sensor saturation for hysteresis reduction in GMR magnetometers

Philip S. Mease, Robert R. Krchnavek, Jacob T. Kephart, Peter Ferrara

Rowan University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

5 Scopus citations

Abstract

Giant Magnetoresistance (GMR) sensors offer several advantages over other technologies for the development of general-purpose magnetometers. They are applicable for both AC and DC fields, are relatively sensitive, can be fabricated to measure over a large range of field strengths, have a highspeed response and are low cost. One significant disadvantage of the GMR sensor is that the output is a function of the history of the magnetic fields that have been on the device, i.e., hysteresis. In this work, we demonstrate that hysteresis effects can be virtually eliminated by saturating the GMR sensor prior to making a field measurement. This forces the sensor to follow the same path of output voltage versus applied field for each measurement. Within the limits of our equipment, we cannot determine any hysteresis effects when using this saturation technique and therefore measurement repeatability is dramatically improved.

Original language	American English
Title of host publication	2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings
Pages	230-234
Number of pages	5
DOIs	https://doi.org/10.1109/SAS.2010.5439400
State	Published - May 21 2010
Event	2010 IEEE Sensors Applications Symposium, SAS 2010 - Limerick, Ireland Duration: Feb 23 2010 → Feb 25 2010

Publication series

Name	2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings

Other

Other	2010 IEEE Sensors Applications Symposium, SAS 2010
Country/Territory	Ireland
City	Limerick
Period	2/23/10 → 2/25/10

ASJC Scopus subject areas

Computer Networks and Communications
Electrical and Electronic Engineering

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https://doi.org/10.1109/SAS.2010.5439400

Cite this

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title = "Sensor saturation for hysteresis reduction in GMR magnetometers",

abstract = "Giant Magnetoresistance (GMR) sensors offer several advantages over other technologies for the development of general-purpose magnetometers. They are applicable for both AC and DC fields, are relatively sensitive, can be fabricated to measure over a large range of field strengths, have a highspeed response and are low cost. One significant disadvantage of the GMR sensor is that the output is a function of the history of the magnetic fields that have been on the device, i.e., hysteresis. In this work, we demonstrate that hysteresis effects can be virtually eliminated by saturating the GMR sensor prior to making a field measurement. This forces the sensor to follow the same path of output voltage versus applied field for each measurement. Within the limits of our equipment, we cannot determine any hysteresis effects when using this saturation technique and therefore measurement repeatability is dramatically improved.",

author = "Mease, {Philip S.} and Krchnavek, {Robert R.} and Kephart, {Jacob T.} and Peter Ferrara",

year = "2010",

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language = "American English",

isbn = "9781424449897",

series = "2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings",

pages = "230--234",

booktitle = "2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings",

note = "2010 IEEE Sensors Applications Symposium, SAS 2010 ; Conference date: 23-02-2010 Through 25-02-2010",

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Mease, PS, Krchnavek, RR, Kephart, JT & Ferrara, P 2010, Sensor saturation for hysteresis reduction in GMR magnetometers. in 2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings., 5439400, 2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings, pp. 230-234, 2010 IEEE Sensors Applications Symposium, SAS 2010, Limerick, Ireland, 2/23/10. https://doi.org/10.1109/SAS.2010.5439400

Sensor saturation for hysteresis reduction in GMR magnetometers. / Mease, Philip S.; Krchnavek, Robert R.; Kephart, Jacob T. et al.
2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings. 2010. p. 230-234 5439400 (2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Sensor saturation for hysteresis reduction in GMR magnetometers

AU - Mease, Philip S.

AU - Krchnavek, Robert R.

AU - Kephart, Jacob T.

AU - Ferrara, Peter

PY - 2010/5/21

Y1 - 2010/5/21

N2 - Giant Magnetoresistance (GMR) sensors offer several advantages over other technologies for the development of general-purpose magnetometers. They are applicable for both AC and DC fields, are relatively sensitive, can be fabricated to measure over a large range of field strengths, have a highspeed response and are low cost. One significant disadvantage of the GMR sensor is that the output is a function of the history of the magnetic fields that have been on the device, i.e., hysteresis. In this work, we demonstrate that hysteresis effects can be virtually eliminated by saturating the GMR sensor prior to making a field measurement. This forces the sensor to follow the same path of output voltage versus applied field for each measurement. Within the limits of our equipment, we cannot determine any hysteresis effects when using this saturation technique and therefore measurement repeatability is dramatically improved.

AB - Giant Magnetoresistance (GMR) sensors offer several advantages over other technologies for the development of general-purpose magnetometers. They are applicable for both AC and DC fields, are relatively sensitive, can be fabricated to measure over a large range of field strengths, have a highspeed response and are low cost. One significant disadvantage of the GMR sensor is that the output is a function of the history of the magnetic fields that have been on the device, i.e., hysteresis. In this work, we demonstrate that hysteresis effects can be virtually eliminated by saturating the GMR sensor prior to making a field measurement. This forces the sensor to follow the same path of output voltage versus applied field for each measurement. Within the limits of our equipment, we cannot determine any hysteresis effects when using this saturation technique and therefore measurement repeatability is dramatically improved.

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Sensor saturation for hysteresis reduction in GMR magnetometers

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