Domain wall motions in perpendicularly magnetized CoFe/Pd multilayer nanowire

Zhaoliang Meng, Manoj Kumar, Jinjun Qiu, Guchang Han, Kie-Leong Teo, Duc-The Ngo

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    Abstract

    Current-induced domain wall (DW) motion is investigated in a 600nm wide nanowire using multilayer film with a structure of Ta(5nm)/Pd(5nm)/[CoFe(0.4nm)/Pd(1.2nm)]15/Ta(5nm) in terms of anomalous Hall effect measurements. It is found that motion of DWs can be driven by a current density as low as 1. 44×1011Am−2. The effect of the Oersted field (HOe) and spin transfer torque field (HST), which are considered as effective fields for DW motion, is quantitatively separated from the dependence of depinning fields on the current. The results show that the motion of the walls is essentially dominated by the non-adiabaticity with a high non-adiabatic factor β of up to 0.4.
    Original languageEnglish
    Article number345001
    JournalJournal of Physics D: Applied Physics
    Volume47
    Issue number34
    Number of pages5
    ISSN0022-3727
    DOIs
    Publication statusPublished - 2014

    Keywords

    • Domain wall motion
    • CoFe/Pd multilayers
    • Spin transfer torque

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