Spin-transfer in magnetic metallic nanopillars

Andrew D. Kent

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    I will present experiments on spin-transfer induced magnetization reversal and excitations in magnetic metallic nanopillars. For these studies, sub-micron lateral dimension (∼50nm) pillar devices have been fabricated by means of a new nano-stencil mask process ideal for systematic variation of layer composition and thickness [1]. My talk will address three aspects of the physics of spin-transfer: (A) The phase-diagram for magnetic switching in bilayer (Co/Cu/Co) nanopillars in large magnetic fields applied perpendicular to the plane of the layers [2]; (B) Current-induced excitations in single Cobalt ferromagnetic layer (Cu/Co/Cu) nanopillars (i.e., in structures without a fixed spin-polarizing magnetic reference layer) [3]; and (C) the dependence of the switching current on free magnetic layer thicknesses in bilayer structures. In latter case, the thickness of a Cobalt layer has been systematically varied from 0.5 to 4 nm. However, the slope of the switching current, dI c/dH, is found to have only a weak dependence on this thickness at low temperature (4.2 K), in contrast to the linear thickness dependence expected in the original model of spin-transfer [4|. I will discuss interpretations of this behavior, including the possible importance of spin-pumping induced magnetic damping in these ultra-thin free magnetic layers.

    Original languageEnglish (US)
    Title of host publicationINTERMAG ASIA 2005: Digests of the IEEE International Magnetics Conference
    Pages783
    Number of pages1
    StatePublished - 2005
    EventINTERMAG ASIA 2005: Digests of the IEEE International Magnetics Conference - Nagoya, Japan
    Duration: Apr 4 2005Apr 8 2005

    Other

    OtherINTERMAG ASIA 2005: Digests of the IEEE International Magnetics Conference
    CountryJapan
    CityNagoya
    Period4/4/054/8/05

    Fingerprint

    Cobalt
    Magnetization reversal
    Induced currents
    Phase diagrams
    Masks
    Physics
    Damping
    Magnetic fields
    Chemical analysis
    Experiments
    Temperature

    ASJC Scopus subject areas

    • Engineering(all)

    Cite this

    Kent, A. D. (2005). Spin-transfer in magnetic metallic nanopillars. In INTERMAG ASIA 2005: Digests of the IEEE International Magnetics Conference (pp. 783). [GA 03]

    Spin-transfer in magnetic metallic nanopillars. / Kent, Andrew D.

    INTERMAG ASIA 2005: Digests of the IEEE International Magnetics Conference. 2005. p. 783 GA 03.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Kent, AD 2005, Spin-transfer in magnetic metallic nanopillars. in INTERMAG ASIA 2005: Digests of the IEEE International Magnetics Conference., GA 03, pp. 783, INTERMAG ASIA 2005: Digests of the IEEE International Magnetics Conference, Nagoya, Japan, 4/4/05.
    Kent AD. Spin-transfer in magnetic metallic nanopillars. In INTERMAG ASIA 2005: Digests of the IEEE International Magnetics Conference. 2005. p. 783. GA 03
    Kent, Andrew D. / Spin-transfer in magnetic metallic nanopillars. INTERMAG ASIA 2005: Digests of the IEEE International Magnetics Conference. 2005. pp. 783
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