• DocumentCode
    1488239
  • Title

    Very high sensitivity GMR spin-valve magnetometer

  • Author

    Smith, Neil ; Zeltser, Alexander M. ; Yang, Danny L. ; Koeppe, Peter V.

  • Author_Institution
    San Diego Labs., Eastman Kodak Co., San Diego, CA, USA
  • Volume
    33
  • Issue
    5
  • fYear
    1997
  • fDate
    9/1/1997 12:00:00 AM
  • Firstpage
    3385
  • Lastpage
    3387
  • Abstract
    A NiFe/Co/Cu GMR spin-valve magnetometer is designed, built, and tested. Thin-film flux-concentrators provide 50× gain, yielding hysteresis-free sensitivity 1/R dR/dH=11%/0e in a 1 mm2, internally temperature compensated device. Detection levels of 2 μOe/(Hz)1/2 (at 1 Hz) are limited by 1/f resistance noise in the GMR films, which is examined in detail. Improvement by 10× is possible via increased device size, as well as lower noise MR films
  • Keywords
    1/f noise; giant magnetoresistance; magnetometers; magnetoresistive devices; 1/f resistance noise; GMR spin-valve magnetometer; NiFe-Co-Cu; gain; sensitivity; temperature compensation; thin-film flux-concentrator; Anisotropic magnetoresistance; Giant magnetoresistance; Hysteresis; Magnetic anisotropy; Magnetic films; Magnetic flux; Magnetic sensors; Magnetometers; Magnetostatics; Noise level; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature sensors; Testing; Thin film devices;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/20.617952
  • Filename
    617952
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1488239