Temperature effects in exchange-biased planar Hall sensors for bioapplications

Christian Danvad Damsgaard, Bjarke Thomas Dalslet, S.C. Freitas, P.P. Freitas, Mikkel Fougt Hansen

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    The temperature dependence of exchange biased planar Hall effect sensors is investigated between T = −10 and 70 °C. It is shown that a single domain model describes the system well and that the temperature coefficient of the low-field sensitivity at T = 25 °C is 0.32%/°C. A procedure for temperature correction by use of a reference sensor is demonstrated. Consequences for magnetic biosensing are exemplified with calculations on M-280 Dynabeads®.
    Original languageEnglish
    JournalSensors and Actuators A: Physical
    Volume156
    Issue number1
    Pages (from-to)103-108
    ISSN0924-4247
    DOIs
    Publication statusPublished - 2009
    EventEUROSENSORS XXII - Dresden, Germany
    Duration: 7 Sep 200810 Sep 2008
    Conference number: 22

    Conference

    ConferenceEUROSENSORS XXII
    Number22
    CountryGermany
    CityDresden
    Period07/09/200810/09/2008

    Keywords

    • Magnetic biosensors
    • Planar Hall effect
    • Anisotropic magnetoresistance
    • Exchange bias

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