Micromagnetism and magnetization reversal of micron-scale (110) Fe thin-film magnetic elements

J. Yu, U. Rüdiger, A. D. Kent, L. Thomas, S. S P Parkin

    Research output: Contribution to journalArticle

    Abstract

    Magnetic force microscope (MFM) imaging in conjunction with longitudinal Kerr hysteresis loop measurements have been used to investigate the micromagnetic behavior of micron scale epitaxial (110) bcc Fe thin-film elements (50-nm thick) with rectangular, triangular, and needle-shaped ends and competing magnetic anisotropies. Thin-film elements of 2-μm width and 6-μm length and greater have been fabricated with their long axis oriented either parallel or perpendicular to the [001] in-plane magnetocrystalline easy axis. For elements with their long axis perpendicular to the [001] direction, the end shape is critical in determining domain nucleation, domain configurations, and magnetic hysteresis. The magnetization reversal mechanisms are revealed by direct field dependent MFM imaging. Magnetic vortex configurations within elements during reversal are seen to be affected by small changes in element corner shape. Similarly, small trapped domains and domain walls are observed to applied fields significantly larger than the coercive field and apparent magnetic saturation field, as determined by hysteresis loop measurements of arrays of elements. These are shown to have a dramatic effect on the character of the low-field magnetic hysteresis. Particles with long axis parallel to the [001] direction have large remanence and switching fields which also depend sensitively on end shape. The angular dependence of the switching field observed in these elements is contrasted to that of magnetization reversal by coherent rotation. [50163-1829(99)10533-2]

    Original languageEnglish (US)
    Pages (from-to)7352-7358
    Number of pages7
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume60
    Issue number10
    StatePublished - 1999

    Fingerprint

    Magnetic thin films
    Magnetization reversal
    Magnetic hysteresis
    Hysteresis loops
    Microscopes
    hysteresis
    Imaging techniques
    Thin films
    magnetization
    Remanence
    Magnetic anisotropy
    Domain walls
    Saturation magnetization
    thin films
    Needles
    Vortex flow
    Nucleation
    microscopes
    remanence
    configurations

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Micromagnetism and magnetization reversal of micron-scale (110) Fe thin-film magnetic elements. / Yu, J.; Rüdiger, U.; Kent, A. D.; Thomas, L.; Parkin, S. S P.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 60, No. 10, 1999, p. 7352-7358.

    Research output: Contribution to journalArticle

    Yu, J. ; Rüdiger, U. ; Kent, A. D. ; Thomas, L. ; Parkin, S. S P. / Micromagnetism and magnetization reversal of micron-scale (110) Fe thin-film magnetic elements. In: Physical Review B - Condensed Matter and Materials Physics. 1999 ; Vol. 60, No. 10. pp. 7352-7358.
    @article{7da64db781b2417197f64e06b8c3fd4d,
    title = "Micromagnetism and magnetization reversal of micron-scale (110) Fe thin-film magnetic elements",
    abstract = "Magnetic force microscope (MFM) imaging in conjunction with longitudinal Kerr hysteresis loop measurements have been used to investigate the micromagnetic behavior of micron scale epitaxial (110) bcc Fe thin-film elements (50-nm thick) with rectangular, triangular, and needle-shaped ends and competing magnetic anisotropies. Thin-film elements of 2-μm width and 6-μm length and greater have been fabricated with their long axis oriented either parallel or perpendicular to the [001] in-plane magnetocrystalline easy axis. For elements with their long axis perpendicular to the [001] direction, the end shape is critical in determining domain nucleation, domain configurations, and magnetic hysteresis. The magnetization reversal mechanisms are revealed by direct field dependent MFM imaging. Magnetic vortex configurations within elements during reversal are seen to be affected by small changes in element corner shape. Similarly, small trapped domains and domain walls are observed to applied fields significantly larger than the coercive field and apparent magnetic saturation field, as determined by hysteresis loop measurements of arrays of elements. These are shown to have a dramatic effect on the character of the low-field magnetic hysteresis. Particles with long axis parallel to the [001] direction have large remanence and switching fields which also depend sensitively on end shape. The angular dependence of the switching field observed in these elements is contrasted to that of magnetization reversal by coherent rotation. [50163-1829(99)10533-2]",
    author = "J. Yu and U. R{\"u}diger and Kent, {A. D.} and L. Thomas and Parkin, {S. S P}",
    year = "1999",
    language = "English (US)",
    volume = "60",
    pages = "7352--7358",
    journal = "Physical Review B-Condensed Matter",
    issn = "1098-0121",
    publisher = "American Physical Society",
    number = "10",

    }

    TY - JOUR

    T1 - Micromagnetism and magnetization reversal of micron-scale (110) Fe thin-film magnetic elements

    AU - Yu, J.

    AU - Rüdiger, U.

    AU - Kent, A. D.

    AU - Thomas, L.

    AU - Parkin, S. S P

    PY - 1999

    Y1 - 1999

    N2 - Magnetic force microscope (MFM) imaging in conjunction with longitudinal Kerr hysteresis loop measurements have been used to investigate the micromagnetic behavior of micron scale epitaxial (110) bcc Fe thin-film elements (50-nm thick) with rectangular, triangular, and needle-shaped ends and competing magnetic anisotropies. Thin-film elements of 2-μm width and 6-μm length and greater have been fabricated with their long axis oriented either parallel or perpendicular to the [001] in-plane magnetocrystalline easy axis. For elements with their long axis perpendicular to the [001] direction, the end shape is critical in determining domain nucleation, domain configurations, and magnetic hysteresis. The magnetization reversal mechanisms are revealed by direct field dependent MFM imaging. Magnetic vortex configurations within elements during reversal are seen to be affected by small changes in element corner shape. Similarly, small trapped domains and domain walls are observed to applied fields significantly larger than the coercive field and apparent magnetic saturation field, as determined by hysteresis loop measurements of arrays of elements. These are shown to have a dramatic effect on the character of the low-field magnetic hysteresis. Particles with long axis parallel to the [001] direction have large remanence and switching fields which also depend sensitively on end shape. The angular dependence of the switching field observed in these elements is contrasted to that of magnetization reversal by coherent rotation. [50163-1829(99)10533-2]

    AB - Magnetic force microscope (MFM) imaging in conjunction with longitudinal Kerr hysteresis loop measurements have been used to investigate the micromagnetic behavior of micron scale epitaxial (110) bcc Fe thin-film elements (50-nm thick) with rectangular, triangular, and needle-shaped ends and competing magnetic anisotropies. Thin-film elements of 2-μm width and 6-μm length and greater have been fabricated with their long axis oriented either parallel or perpendicular to the [001] in-plane magnetocrystalline easy axis. For elements with their long axis perpendicular to the [001] direction, the end shape is critical in determining domain nucleation, domain configurations, and magnetic hysteresis. The magnetization reversal mechanisms are revealed by direct field dependent MFM imaging. Magnetic vortex configurations within elements during reversal are seen to be affected by small changes in element corner shape. Similarly, small trapped domains and domain walls are observed to applied fields significantly larger than the coercive field and apparent magnetic saturation field, as determined by hysteresis loop measurements of arrays of elements. These are shown to have a dramatic effect on the character of the low-field magnetic hysteresis. Particles with long axis parallel to the [001] direction have large remanence and switching fields which also depend sensitively on end shape. The angular dependence of the switching field observed in these elements is contrasted to that of magnetization reversal by coherent rotation. [50163-1829(99)10533-2]

    UR - http://www.scopus.com/inward/record.url?scp=4243254324&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=4243254324&partnerID=8YFLogxK

    M3 - Article

    VL - 60

    SP - 7352

    EP - 7358

    JO - Physical Review B-Condensed Matter

    JF - Physical Review B-Condensed Matter

    SN - 1098-0121

    IS - 10

    ER -