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Under the terms of the Creative Commons Attribution License 3.0 (CC-BY).-- et al.The crossover from antidot to dot magnetic behavior on arrays patterned in a ferromagnetic thin film has been achieved by modifying only the geometry. A series of antidot arrays has been fabricated on cobalt with fixed diameter d and by reducing the period of the array p from pd to p<d. A dramatic change in the coercivity dependence with p, correlated with a significant modification in the magnetic domain structure observed by x-ray photoemission electron microscopy, evidences the crossover. An intermediate regime has been found between the superdomain structure present in antidot arrays and the array of astroid-state noncorrelated dots. The study has been reproduced for a different ferromagnetic material, permalloy, and supported by micromagnetic simulations. © 2014 American Physical Society.The financial support of MINECO-FEDER MAT2011/23791, MAT2012-38318-C03-03, MAT2012-36844, FIS2010-20979-C02-02, and Basque Government Project No. PI2012-47 is acknowledged.Peer Reviewe

Magnetic antidot to dot crossover in Co and Py nanopatterned thin films