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    Topological defects in flat nanomagnets: the magnetostatic limit

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    Oleg Topological 2006.pdf (73.53Kb)
    Date
    2006-04-15
    Author
    Chern, G.-W.
    Youk, H.
    Tchernyshyov, O.
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    Abstract
    We discuss elementary topological defects in soft magnetic nanoparticles in the thin-film geometry. In the limit dominated by magnetostatic forces the low-energy defects are vortices (winding number n=+1), cross ties (n=-1), and edge defects with n=-1/2. We obtain topological constraints on the possible composition of domain walls. The simplest domain wall in this regime is composed of two -1/2 edge defects and a vortex, in accordance with observations and numerics.
    URI
    http://jhir.library.jhu.edu/handle/1774.2/33727
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