Hysteresis Reduction in Tunneling Magnetoresistive Sensor with AC Modulation Magnetic Field

Shu Hsien Liao, Han Sheng Huang, Andrei Sokolov, Yi Yang, Yen Fu Liu, Xiaolu Yin, Amy Wilson, Joshua Trujillo, Dan Ewing, Sy Hwang Liou

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A simple and practical ac modulation method to reduce the hysteresis in tunneling magnetoresistive (TMR) sensor is demonstrated. It is shown that with a suitable ac modulation magnetic field that is applied along the sensing direction of the TMR sensor, the hysteresis in the sensor can be reduced to a negligible level. Also, depending on the amplitude of the modulation field, the sensitivity and the dynamic range of the TMR sensor can be tuned to meet practical requirements in specific applications. The influence of the modulation on the noise of TMR sensor is also studied.

    Original languageEnglish
    Article number9143198
    JournalIEEE Transactions on Magnetics
    Volume57
    Issue number2
    DOIs
    Publication statusPublished - 2021 Feb

    Keywords

    • AC modulation
    • dynamic range
    • hysteresis reduction
    • magnetic tunnel junction (MTJ)
    • tunneling magnetoresistive (TMR) sensor

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering

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