Sensitivity Enhancement of a Pd/Co Bilayer Film for Hydrogen Gas Sensing Using a Perpendicular-to-Plane Ferromagnetic Resonance Configuration

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    Abstract

    Previously, it has been shown that the strength of the perpendicular magnetic anisotropy (PMA) of thin palladium (Pd)–cobalt (Co) bilayer films can be modified when hydrogen gas is absorbed by the Pd layer. In our recent work, we showed that the ferromagnetic resonance (FMR) response of this material is sensitive to the changes in PMA upon exposure of Pd to hydrogen gas. As such, a simple, compact, and contactless hydrogen gas sensor could exploit the FMR-based detection of the reversible hydrogen-gas induced changes in PMA. The magnitude of the FMR peak shift is critical to determining detection sensitivity: the higher the FMR peak shift at a given hydrogen gas concentration, the higher the sensitivity. Here, we demonstrate that the detection sensitivity is enhanced when the static magnetic field is applied perpendicular to the film plane. This is due to the frequency large shift, which is eight times larger than in the in-plane FMR configuration studied previously. An analysis based on the Kittel equation
    for FMR frequencies of an FM film is carried out in order to understand the mechanism of sensitivity enhancement. The result is important for optimizing Pd/Co bilayered thin films for use in novel platforms for hydrogen gas sensing.
    Original languageEnglish
    Article number7407382
    Number of pages3
    JournalIEEE Transactions on Magnetics
    Volume52
    Issue number7
    DOIs
    Publication statusPublished - 15 Feb 2016

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    Ferromagnetic resonance
    Palladium
    Cobalt
    Hydrogen
    Gases
    Magnetic anisotropy
    Chemical sensors
    Magnetic fields
    Thin films

    Cite this

    @article{716d7a81563f42cea6235e68967943d2,
    title = "Sensitivity Enhancement of a Pd/Co Bilayer Film for Hydrogen Gas Sensing Using a Perpendicular-to-Plane Ferromagnetic Resonance Configuration",
    abstract = "Previously, it has been shown that the strength of the perpendicular magnetic anisotropy (PMA) of thin palladium (Pd)–cobalt (Co) bilayer films can be modified when hydrogen gas is absorbed by the Pd layer. In our recent work, we showed that the ferromagnetic resonance (FMR) response of this material is sensitive to the changes in PMA upon exposure of Pd to hydrogen gas. As such, a simple, compact, and contactless hydrogen gas sensor could exploit the FMR-based detection of the reversible hydrogen-gas induced changes in PMA. The magnitude of the FMR peak shift is critical to determining detection sensitivity: the higher the FMR peak shift at a given hydrogen gas concentration, the higher the sensitivity. Here, we demonstrate that the detection sensitivity is enhanced when the static magnetic field is applied perpendicular to the film plane. This is due to the frequency large shift, which is eight times larger than in the in-plane FMR configuration studied previously. An analysis based on the Kittel equationfor FMR frequencies of an FM film is carried out in order to understand the mechanism of sensitivity enhancement. The result is important for optimizing Pd/Co bilayered thin films for use in novel platforms for hydrogen gas sensing.",
    author = "Lueng, {Chiu Ming} and Peter Metaxas and Mikhail Kostylev",
    year = "2016",
    month = "2",
    day = "15",
    doi = "10.1109/TMAG.2016.2530140",
    language = "English",
    volume = "52",
    journal = "Institute of Electrical and Electronics Engineers Transactions on Magnetics",
    issn = "0018-9464",
    publisher = "IEEE, Institute of Electrical and Electronics Engineers",
    number = "7",

    }

    TY - JOUR

    T1 - Sensitivity Enhancement of a Pd/Co Bilayer Film for Hydrogen Gas Sensing Using a Perpendicular-to-Plane Ferromagnetic Resonance Configuration

    AU - Lueng, Chiu Ming

    AU - Metaxas, Peter

    AU - Kostylev, Mikhail

    PY - 2016/2/15

    Y1 - 2016/2/15

    N2 - Previously, it has been shown that the strength of the perpendicular magnetic anisotropy (PMA) of thin palladium (Pd)–cobalt (Co) bilayer films can be modified when hydrogen gas is absorbed by the Pd layer. In our recent work, we showed that the ferromagnetic resonance (FMR) response of this material is sensitive to the changes in PMA upon exposure of Pd to hydrogen gas. As such, a simple, compact, and contactless hydrogen gas sensor could exploit the FMR-based detection of the reversible hydrogen-gas induced changes in PMA. The magnitude of the FMR peak shift is critical to determining detection sensitivity: the higher the FMR peak shift at a given hydrogen gas concentration, the higher the sensitivity. Here, we demonstrate that the detection sensitivity is enhanced when the static magnetic field is applied perpendicular to the film plane. This is due to the frequency large shift, which is eight times larger than in the in-plane FMR configuration studied previously. An analysis based on the Kittel equationfor FMR frequencies of an FM film is carried out in order to understand the mechanism of sensitivity enhancement. The result is important for optimizing Pd/Co bilayered thin films for use in novel platforms for hydrogen gas sensing.

    AB - Previously, it has been shown that the strength of the perpendicular magnetic anisotropy (PMA) of thin palladium (Pd)–cobalt (Co) bilayer films can be modified when hydrogen gas is absorbed by the Pd layer. In our recent work, we showed that the ferromagnetic resonance (FMR) response of this material is sensitive to the changes in PMA upon exposure of Pd to hydrogen gas. As such, a simple, compact, and contactless hydrogen gas sensor could exploit the FMR-based detection of the reversible hydrogen-gas induced changes in PMA. The magnitude of the FMR peak shift is critical to determining detection sensitivity: the higher the FMR peak shift at a given hydrogen gas concentration, the higher the sensitivity. Here, we demonstrate that the detection sensitivity is enhanced when the static magnetic field is applied perpendicular to the film plane. This is due to the frequency large shift, which is eight times larger than in the in-plane FMR configuration studied previously. An analysis based on the Kittel equationfor FMR frequencies of an FM film is carried out in order to understand the mechanism of sensitivity enhancement. The result is important for optimizing Pd/Co bilayered thin films for use in novel platforms for hydrogen gas sensing.

    U2 - 10.1109/TMAG.2016.2530140

    DO - 10.1109/TMAG.2016.2530140

    M3 - Article

    VL - 52

    JO - Institute of Electrical and Electronics Engineers Transactions on Magnetics

    JF - Institute of Electrical and Electronics Engineers Transactions on Magnetics

    SN - 0018-9464

    IS - 7

    M1 - 7407382

    ER -