Current-induced multiple spin structures in 100 nm ring magnetic tunnel junctions

H. X. Wei, F. Q. Zhu, X. F. Han, Z. C. Wen, C. L. Chien

    研究成果: Article査読

    22 被引用数 (Scopus)

    抄録

    Nanoring magnetic tunnel junctions (NR-MTJs) with outer diameters as small as 100 nm and a thin wall width of 25 nm have been fabricated. NR-MTJs acquire different resistance states when they are switched by electrical currents compared with when they are switched by external magnetic fields. This can be explained by combining the effects of spin-transfer torque and circulatory Oersted field during current-induced switching. We provide a model for computing the equivalent circulatory magnetic field due to the nonadiabatic spin torque of the spin-polarized current through the MTJ. The multiple spin states in nanoring MTJs provide prospects for magnetic memory devices.

    本文言語English
    論文番号224432
    ジャーナルPhysical Review B - Condensed Matter and Materials Physics
    77
    22
    DOI
    出版ステータスPublished - 2008 6月 20

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料
    • 凝縮系物理学

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