Magnetization reversal measurements of size-selected iron oxide particles produced via an aerosol route

Bertram Schleicher, Unto Tapper, Esko Kauppinen, M. Martin, L. Roschier, M. Paalanen, W. Wernsdorfer, A. Benoit

    Research output: Contribution to journalArticleScientificpeer-review

    7 Citations (Scopus)

    Abstract

    We report first measurements of the magnetization reversal of monodisperse 30 nm and 50 nm ferromagnetic Fe3O4 particles. These particles are produced in a carrier gas as an aerosol by spray pyrolysis. After production and size selection, they are precipitated on a silicon chip with a niobium SQUID (superconducting quantum interference device) incorporated on its surface. By changing a magnetic field in the plane of the SQUID, we can measure the magnetization reversal of the particles by the flux they induce into the SQUID.
    The angular dependence of this reversal is determined by rotating the magnetic field around the SQUID. Scanning electron microscope (SEM) images have confirmed the particle size and revealed the position of the collected particles. If the particle concentration is too high, we cannot detect changes in the magnetic moment of a single particle, but measure the magnetic properties of the whole assembly.
    If only a few particles are found on the SQUID loop the angular dependence of the magnetic reversal of a single particle can be measured; this result is compared with a simple model of magnetization reversal.
    Original languageEnglish
    Pages (from-to)315-320
    JournalApplied Organometallic Chemistry
    Volume12
    Issue number5
    DOIs
    Publication statusPublished - 1998
    MoE publication typeA1 Journal article-refereed
    EventNanoporous Materials and Magnetic Properties of Nanostructured Materials: Organized by the ECNM - Frascati, Italy
    Duration: 19 Sep 199720 Sep 1997

    Fingerprint

    Magnetization reversal
    SQUIDs
    Aerosols
    Niobium
    Magnetic fields
    Spray pyrolysis
    Silicon
    Magnetic moments
    Magnetic properties
    Electron microscopes
    Gases
    Particle size
    ferric oxide
    Fluxes
    Scanning

    Cite this

    Schleicher, Bertram ; Tapper, Unto ; Kauppinen, Esko ; Martin, M. ; Roschier, L. ; Paalanen, M. ; Wernsdorfer, W. ; Benoit, A. / Magnetization reversal measurements of size-selected iron oxide particles produced via an aerosol route. In: Applied Organometallic Chemistry. 1998 ; Vol. 12, No. 5. pp. 315-320.
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    title = "Magnetization reversal measurements of size-selected iron oxide particles produced via an aerosol route",
    abstract = "We report first measurements of the magnetization reversal of monodisperse 30 nm and 50 nm ferromagnetic Fe3O4 particles. These particles are produced in a carrier gas as an aerosol by spray pyrolysis. After production and size selection, they are precipitated on a silicon chip with a niobium SQUID (superconducting quantum interference device) incorporated on its surface. By changing a magnetic field in the plane of the SQUID, we can measure the magnetization reversal of the particles by the flux they induce into the SQUID. The angular dependence of this reversal is determined by rotating the magnetic field around the SQUID. Scanning electron microscope (SEM) images have confirmed the particle size and revealed the position of the collected particles. If the particle concentration is too high, we cannot detect changes in the magnetic moment of a single particle, but measure the magnetic properties of the whole assembly. If only a few particles are found on the SQUID loop the angular dependence of the magnetic reversal of a single particle can be measured; this result is compared with a simple model of magnetization reversal.",
    author = "Bertram Schleicher and Unto Tapper and Esko Kauppinen and M. Martin and L. Roschier and M. Paalanen and W. Wernsdorfer and A. Benoit",
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    Magnetization reversal measurements of size-selected iron oxide particles produced via an aerosol route. / Schleicher, Bertram; Tapper, Unto; Kauppinen, Esko; Martin, M.; Roschier, L.; Paalanen, M.; Wernsdorfer, W.; Benoit, A.

    In: Applied Organometallic Chemistry, Vol. 12, No. 5, 1998, p. 315-320.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Magnetization reversal measurements of size-selected iron oxide particles produced via an aerosol route

    AU - Schleicher, Bertram

    AU - Tapper, Unto

    AU - Kauppinen, Esko

    AU - Martin, M.

    AU - Roschier, L.

    AU - Paalanen, M.

    AU - Wernsdorfer, W.

    AU - Benoit, A.

    PY - 1998

    Y1 - 1998

    N2 - We report first measurements of the magnetization reversal of monodisperse 30 nm and 50 nm ferromagnetic Fe3O4 particles. These particles are produced in a carrier gas as an aerosol by spray pyrolysis. After production and size selection, they are precipitated on a silicon chip with a niobium SQUID (superconducting quantum interference device) incorporated on its surface. By changing a magnetic field in the plane of the SQUID, we can measure the magnetization reversal of the particles by the flux they induce into the SQUID. The angular dependence of this reversal is determined by rotating the magnetic field around the SQUID. Scanning electron microscope (SEM) images have confirmed the particle size and revealed the position of the collected particles. If the particle concentration is too high, we cannot detect changes in the magnetic moment of a single particle, but measure the magnetic properties of the whole assembly. If only a few particles are found on the SQUID loop the angular dependence of the magnetic reversal of a single particle can be measured; this result is compared with a simple model of magnetization reversal.

    AB - We report first measurements of the magnetization reversal of monodisperse 30 nm and 50 nm ferromagnetic Fe3O4 particles. These particles are produced in a carrier gas as an aerosol by spray pyrolysis. After production and size selection, they are precipitated on a silicon chip with a niobium SQUID (superconducting quantum interference device) incorporated on its surface. By changing a magnetic field in the plane of the SQUID, we can measure the magnetization reversal of the particles by the flux they induce into the SQUID. The angular dependence of this reversal is determined by rotating the magnetic field around the SQUID. Scanning electron microscope (SEM) images have confirmed the particle size and revealed the position of the collected particles. If the particle concentration is too high, we cannot detect changes in the magnetic moment of a single particle, but measure the magnetic properties of the whole assembly. If only a few particles are found on the SQUID loop the angular dependence of the magnetic reversal of a single particle can be measured; this result is compared with a simple model of magnetization reversal.

    U2 - 10.1002/(SICI)1099-0739(199805)12:5<315::AID-AOC723>3.0.CO;2-6

    DO - 10.1002/(SICI)1099-0739(199805)12:5<315::AID-AOC723>3.0.CO;2-6

    M3 - Article

    VL - 12

    SP - 315

    EP - 320

    JO - Applied Organometallic Chemistry

    JF - Applied Organometallic Chemistry

    SN - 0268-2605

    IS - 5

    ER -