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    Phys Rev Lett. 2005 Oct 14;95(16):167202. Epub 2005 Oct 10.

    Ferromagnetism in Mn-doped GaN nanowires.

    Wang Q, Sun Q, Jena P.

    Source

    Physics Department, Virginia Commonwealth University, Richmond, 23284, USA.

    Abstract

    Using density functional theory we show that the magnetic coupling of Mn atoms in the nanowires, unlike that in the thin film, is ferromagnetic. This ferromagnetic coupling, brought about due to the confinement of electrons in the radial direction and the curvature of the Mn-doped GaN nanowires' surface, is mediated by N as is evidenced from the overlap between Mn 3d and N 2p states. Calculations of the anisotropic energy further show that the magnetic moment orients preferably along the [1010] direction while the wire axis points along the [0001] direction.

    PMID:
    16241837
    [PubMed]

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