Switching properties of free-standing epitaxial ring magnets
Kläui M., Lopez-Diaz L., Rothman J., Vaz CAF., Bland JAC., Cui Z.
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.