Abstract
In this work we present two fabrication approaches for patterning submicron Pacman-like (PL) magnetic nanoelements, the additive and subtractive process. Within the first process, PL structures are revealed using a standard lift-off technique. The second one is based on argon ion milling through titanium mask patterns. In the PL magnet the missing sector itself represents a dipole, which together with the external field, controls the chirality of the nucleated vortex. In order to determine the chirality of the vortex ground state, an array of PL nanomagnets of the diameter 200nm prepared by the subtractive process, is mapped by the magnetic force microscopy. The experimental results are in good agreement with the results achieved by the micromagnetic simulations.
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