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Title:
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Topological defects in flat nanomagnets: the magnetostatic limit |
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Author:
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Chern, G.-W.; Youk, H.; Tchernyshyov, O. |
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Abstract:
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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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URI:
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http://jhir.library.jhu.edu/handle/1774.2/33727
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Date:
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2006-04-15 |
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Citation:
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Journal of Applied Physics 15 April 2006, vol.99, no.8, pp. 8Q505-1-3
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Subject:
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noncrystalline defects
magnetostatic waves
magnetic domain walls
nanoparticles
soft magnetic materials
topological defects
flat nanomagnets
magnetostatic limit
ferromagnetism
soft magnetic nanoparticles
nanoparticles
magnetostatic forces
cross ties
edge defects
domain walls
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