Sensor saturation for hysteresis reduction in GMR magnetometers

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

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish (US)
Title of host publication2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings
Pages230-234
Number of pages5
DOIs
StatePublished - May 21 2010
Event2010 IEEE Sensors Applications Symposium, SAS 2010 - Limerick, Ireland
Duration: Feb 23 2010Feb 25 2010

Publication series

Name2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings

Other

Other2010 IEEE Sensors Applications Symposium, SAS 2010
Country/TerritoryIreland
CityLimerick
Period2/23/102/25/10

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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