X. K. Hu, S. Sievers, A. Müller, H. W. Schumacher
We numerically and experimentally investigate the influence of single defects consisting of a missing antidot on the spin configurations in rectangular permalloy antidot lattices. The introduction of such lattice defects leads to the nucleation of complex domain structures after the decay of a saturating magnetic field. Micromagnetic simulations yield four typical domain configurations around the defect with different energy densities. The existence of the three lower energy spin configurations is confirmed by magnetic force microscopy on an antidot lattice containing individual defects.
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http://arxiv.org/abs/1204.1183
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