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    • University of Missouri-Columbia
    • Graduate School - MU Theses and Dissertations (MU)
    • Theses and Dissertations (MU)
    • Dissertations (MU)
    • 2005 Dissertations (MU)
    • 2005 MU dissertations - Freely available online
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    Theory of lattice effects on magnetic interactions in solids

    Meskine, Hakim, 1972-
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    [PDF] research.pdf (1.923Mb)
    Date
    2005
    Format
    Thesis
    Metadata
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    Abstract
    This dissertation focuses on studying the effect of lattice distortions on the magnetic properties of nickelates and manganites. These two families of materials have great potential in industrial applications in the fields of magnetic (superdense hard-drives, fast memory) and charge storage (batteries). The introduction and methods sections present the main ideas of the dissertation and discuss the various techniques used. Electron-lattice coupling is first examined in chapter three for a two-site model where we estimate the magnitude of the isotope effect on the critical temperature and show that it decreases magnetic exchange. In the next part we study electronic structure and magnetism of NaNiO2 and show that inter-planar exchange is reduced by lattice coupling. In the fifth chapter we examine the magnetic polaron and discuss the effect of static lattice coupling on its binding energy, and find it to further stabilize the polaron.
    URI
    https://hdl.handle.net/10355/4121
    https://doi.org/10.32469/10355/4121
    Degree
    Ph. D.
    Thesis Department
    Physics and astronomy (MU)
    Collections
    • 2005 MU dissertations - Freely available online
    • Physics and Astronomy electronic theses and dissertations (MU)

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