Journal
JOURNAL OF APPLIED PHYSICS
Volume 99, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2168439
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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. (C) 2006 American Institute of Physics.
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