Topological defects in flat nanomagnets: the magnetostatic limit

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.

3 pages, eps figures. Proceedings of MMM 05

References in corpus (1)

• Fractional vortices and composite domain walls in flat nanomagnets

Cited by in corpus (5)

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• Dynamics of a vortex domain wall in a magnetic nanostrip: an application of the collective coordinate approach
• Coarsening dynamics of topological defects in thin Permalloy films
• Halfvortices in flat nanomagnets
• Dynamic relaxation of topological defect at Kosterlitz-Thouless phase transition