Magnetic properties of fe microstructures with focused ion beam-fabricated nano-constrictions

Igor V. Roshchin, Jun Yu, Andrew D. Kent, Gary W. Stupian, Martin S. Leung

    Research output: Contribution to journalArticle

    Abstract

    Studies of the magnetic properties of Fe microfabricated wires with a mechanically stable 40 to 120 nm-wide constriction produced with focused ion beam are reported. The 2 to 20 μm-wide wires are fabricated by photolithography from 3 nm and 25 nm-thick epitaxial (110) bcc Fe films. This fabrication method appears to preserve the magnetic properties of the constriction. The structures are studied by MFM and by magneto-optic Kerr effect (MOKE) measurements. The ratio of the wire linewidth to its thickness determines the demagnetization factor and, therefore, influences the coercivity of the wire. Both a step in the width of the wire and a nano-constriction in the middle of the wire are found to be domain wall (DW) pinning centers.

    Original languageEnglish (US)
    Pages (from-to)2101-2103
    Number of pages3
    JournalIEEE Transactions on Magnetics
    Volume37
    Issue number4 I
    DOIs
    StatePublished - Jul 2001

    Fingerprint

    Focused ion beams
    Magnetic properties
    constrictions
    ion beams
    wire
    Wire
    magnetic properties
    microstructure
    Microstructure
    Demagnetization
    Magnetooptical effects
    magnetic force microscopy
    Domain walls
    magneto-optics
    Photolithography
    demagnetization
    photolithography
    Kerr effects
    Coercive force
    Linewidth

    Keywords

    • Fe
    • Ferromagnetic microstructures
    • FIB
    • Iron epitaxial thin films
    • Kerr effect
    • Magnetization reversal
    • MFM
    • Nano-structures

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Physics and Astronomy (miscellaneous)

    Cite this

    Magnetic properties of fe microstructures with focused ion beam-fabricated nano-constrictions. / Roshchin, Igor V.; Yu, Jun; Kent, Andrew D.; Stupian, Gary W.; Leung, Martin S.

    In: IEEE Transactions on Magnetics, Vol. 37, No. 4 I, 07.2001, p. 2101-2103.

    Research output: Contribution to journalArticle

    Roshchin, Igor V. ; Yu, Jun ; Kent, Andrew D. ; Stupian, Gary W. ; Leung, Martin S. / Magnetic properties of fe microstructures with focused ion beam-fabricated nano-constrictions. In: IEEE Transactions on Magnetics. 2001 ; Vol. 37, No. 4 I. pp. 2101-2103.
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