Angular-dependence of magnetization switching for a multi-domain dot: experiment and simulation
O. Fruchart, J. C. Toussaint, P. O. Jubert, W. Wernsdorfer, R. Hertel, D. Mailly, J. Kirschner
Abstract
We have measured the in-plane angular variation of nucleation and annihilation fields of a multi-domain magnetic single dot with a microsquid. The dots are Fe/Mo(110) self-assembled in UHV, with sub-micron size and a hexagonal shape. The angular variations were quantitatively reproduced by micromagnetic simulations. Discontinuities in the variations are observed, and shown to result from bifurcations related to the interplay of the non-uniform magnetization state with the shape of the dot.
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