Planar Hall effect bridge magnetic field sensors

A.D. Henriksen, Bjarke Thomas Dalslet, D.H. Skieller, K.H. Lee, Fridolin Okkels, Mikkel Fougt Hansen

    Research output: Contribution to journalJournal articlepeer-review

    Abstract

    Until now, the planar Hall effect has been studied in samples with cross-shaped Hall geometry. We demonstrate theoretically and experimentally that the planar Hall effect can be observed for an exchange-biased ferromagnetic material in a Wheatstone bridge topology and that the sensor signal can be significantly enhanced by a geometric factor. For the samples in the present study, we demonstrate an enhancement of the sensor output by a factor of about 100 compared to cross-shaped sensors. The presented construction opens a new design and application area of the planar Hall effect, which we term planar Hall effect bridge sensors.
    Original languageEnglish
    JournalApplied Physics Letters
    Volume97
    Issue number1
    ISSN0003-6951
    DOIs
    Publication statusPublished - 2010

    Keywords

    • magnetic field measurement
    • Hall effect transducers
    • magnetic sensors
    • geometry

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