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    Ferrodistorsive orbital ordering in the layered nickelate NaNiO2: A density-functional study

    Meskine, Hakim, 1972-
    Satpathy, Sashi Sekhar, 1956-
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    [PDF] FerrodistorsiveOrbitalOrderingLayered.pdf (388.6Kb)
    Date
    2005
    Format
    Article
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    Abstract
    The electronic structure and magnetism in the sodium nickelate NaNiO2 in the low- temperature phase is studied from density-functional calculations using the linear muffin-tin orbitals method. An antiferromagnetic solution with a magnetic moment of 0.7μB per Ni ion is found. A ferrodistorsive orbital ordering is shown to occur due to the Jahn-Teller distortion around the Ni+3 ion in agreement with the orbital ordering inferred from neutron diffraction. While the intralayer exchange is ferromagnetic, the interlayer exchange is weakly antiferromagnetic, mediated by a long Ni-O-Na-O-Ni superexchange path.
    URI
    http://hdl.handle.net/10355/7229
    Citation
    J. Appl. Phys. 97, 10A314 (2005); (3 pages)
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