Topological defects in flat nanomagnets: the magnetostatic limit
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Date
2006-04-15
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American Institute of Physics
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.
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Keywords
noncrystalline defects, magnetostatic waves, magnetic domain walls, nanoparticles, soft magnetic materials, topological defects, flat nanomagnets, magnetostatic limit, ferromagnetism, soft magnetic nanoparticles, magnetostatic forces, cross ties, edge defects, domain walls
Citation
Journal of Applied Physics 15 April 2006, vol.99, no.8, pp. 8Q505-1-3