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ARTICLE IN PRESS Journal of Magnetism and Magnetic Materials 272–276 (2004) 1674–1675 Observation of a geometrically constrained domain wall in epitaxial FCC Co small disks

By C. A. F. Vaz A, L. Lopez-diaz A, M. Kl. Aui A, J. A. C. Bl, T. L. Monchesky B, J. Unguris B and Z. Cui C


The magnetic nanostructure of epitaxial FCC Co/Cuð001Þ circular elements (B1:7 mm in diameter) has been imaged with scanning electron microscopy with polarisation analysis. A closed flux configuration (quadrant configuration) is observed for most of the disks, characteristic of systems with cubic anisotropy. However, the measured width of the 90 domain wall varies with the distance from the vortex core, from 70725 nm up to a value determined by the disk radius. Such a wide domain wall is a consequence of the geometrical constraints imposed by the element, thus defining a geometrically constrained domain wall, as confirmed by micromagnetic simulations

Topics: Co disk, Domain wall width, SEMPA, Magnetic imaging
Year: 2010
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