Abstract
The magnetic domain structure in Permalloy (Ni81Fe19) micropatterns (10–100 μm) on NiO has been investigated by means of soft x-ray photoemission electron microscopy. The exchange anisotropy between the Ni81Fe19 patterns and the NiO layer results in the formation of complex domain structures which markedly differ from the simple Landau–Lifshitz configurations. The domain structures reflect the competition between the exchange anisotropy and the dipole–dipole interaction in a weakly coupled system. The observed domain structures change with the feature size, as the domain patterns lose complexity in the smaller structures.
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