Magnetic domain wall oscillator with current-perpendicular-to-plane geometry

Soo Man Seo, Kyung Jin Lee

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    By means of analytical 1-D model and full micromagnetic simulation, we investigated the magnetic domain wall (DW) oscillator with current- perpendicular-to-plane geometry. We found that the DW oscillation frequency linearly increases with the applying current density, but drops above a certain threshold. This frequency drop is caused by the deformation of DW due to spin-transfer torque. We found that by applying an external perpendicular magnetic field in addition to the current, this deformation and the frequency drop can be suppressed, which allows obtaining a reliable frequency range for the device application.

    Original languageEnglish
    Article number6027796
    Pages (from-to)3085-3088
    Number of pages4
    JournalIEEE Transactions on Magnetics
    Volume47
    Issue number10
    DOIs
    Publication statusPublished - 2011 Oct

    Bibliographical note

    Funding Information:
    This work was supported in part by the IT R&D program of MKE/KEIT under Grant 2009-F-004-01 and the Korea Science and Engineering Foundation (KOSEF) through the basic research program funded by the Ministry of Science and Technology, Korea, under Contract 2010-0023798.

    Keywords

    • Current-perpendicular-to-plane (CPP) geometry
    • magnetic domain wall (DW)
    • micromagnetic simulation
    • spin-transfer torque (STT)

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering

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