Topological defects in flat nanomagnets: the magnetostatic limit

Details Topological defects in flat nanomagnets: the magnetostatic limit Topological defects in flat nanomagnets: the magnetostatic limit

2005-08-31

arxiv.org/abs/cond-mat/0508740v1

J. Appl. Phys. 99, 08Q505 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, eps figures. Proceedings of MMM 05

Scientific paper

10.1063/1.2168439

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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