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Ferromagnetic vortices deliver robust out-of-plane magnetization at extremelysmall scales. Their handling and creation therefore has high potential tobecome a necessary ingredient for future data storage technologies in order tokeep up with the pace of growing information density demands. In this study weshow that by using one step nanolithography method, we are able to createferromagnetic vortex lattices in thin nickel films. The necessary control ofthe magnetic stray field at the domain edges was achieved by actively modifyingthe ferromagnetic thin film anisotropic properties at nanometer scale. Wepresent experimental evidence using ferromagnetic resonance andmagnetoresistance measurements supporting simulations based on the theoreticalprediction of the proclaimed vortex structures.

Ferromagnetic resonance and magnetoresistive measurements evidencing magnetic vortex crystal in nickel thin film with patterned antidot array