Comparison of spin valve and magnetic tunnel junction magneto resistive sensors in eddy current testing probes

Luis S. Rosado, Filipe A. Cardoso, Susana Cardoso, Telmo G. Santos, Pedro M. Ramos, Paulo P. Freitas, Moisés Piedade

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper compares two different magneto resistive sensor technologies used on the same configuration of eddy current testing probe. Two dimensional testing results on a friction stir welding aluminum joint were used to compare spin valve and magnetic tunnel junction sensors. These results showed that, magnetic tunnel junction sensors, provided a significant improvement on the signal to noise ratio and signal amplitude over spin valves.

Original languageEnglish
Title of host publicationXXI IMEKO World Congress "Measurement in Research and Industry"
PublisherIMEKO-International Measurement Federation Secretariat
Pages693-696
Publication statusPublished - 2015
Event21st IMEKO World Congress on Measurement in Research and Industry - Prague, Czech Republic
Duration: 30 Aug 20154 Sep 2015

Conference

Conference21st IMEKO World Congress on Measurement in Research and Industry
CountryCzech Republic
CityPrague
Period30/08/154/09/15

Keywords

  • Differential
  • Eddy currents testing
  • Magnetic tunnel junction
  • Magneto-resistive
  • Spin valve

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