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We present the results of a study of the magnetic switching properties of arrays of narrow Co(1 0 0) epitaxial ring magnets, with outer diameters between 1 and 2μm, varying inner diameters and varying film thickness. We discuss measurements and the results of numerical computations of the switching fields for the transition from the vortex state to the 'onion' state. A large dependence on the ring width and the film thickness is found. © 2002 Published by Elsevier Science B.V.

Original publication




Journal article


Journal of Magnetism and Magnetic Materials

Publication Date





7 - 10