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Giant Magnetoresistance (GMR) Magnetometers

  • Candid ReigEmail author
  • María-Dolores Cubells-Beltrán
Chapter
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Part of the Smart Sensors, Measurement and Instrumentation book series (SSMI, volume 19)

Abstract

Since its discovering in 1988, the Giant Magnetoresistance (GMR) effect has been widely studied both from the theoretical and the applications points of view. Its rapid development was initially promoted by their extensive use in the read heads of the massive data magnetic storage systems, in the digital world. Since then, novel proposals as basic solid state magnetic sensors have been continuously appearing. Due to their high sensitivity, small size and compatibility with standard CMOS technologies, they have become the preferred choice in scenarios traditionally occupied by Hall sensors. In this chapter, we analyze the main properties of GMR sensors regarding their use as magnetometers. We will deal about the physical basis, the fabrication processes and the parameters constraining their response. We will also mention about some significant application, including developments at the system level.

Keywords

Magnetic Layer Spin Valve Giant Magnetoresistance Free Layer Full Bridge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

At the personal level, we should give thanks to E. Figueras, J. Madrenas and A. Yúfera for their kindness regarding standard IC’s. Also thanks to A. Roldán and J. B. Roldán for their help in developing electrical models. The authors are permanently grateful for the very fruitful collaborations with the INESC-MN. Part of the work has been carried out under projects: HP2003/0123 (Ministry of Science and Technology, Spain), GV05/150 (Valencian Regional Government), ENE2008-06588-C04-04 (Ministry of Science and Innovation, Spain and European Regional Development Fund), UV-INV-AE11-40892 (Universitat de València) and NGG-229 (2010).

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© Springer International Publishing Switzerland 2017

Authors and Affiliations

  1. 1.University of ValenciaValenciaSpain

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