We explore the behavior of periodic arrays of magnetic nanowires bymicromagnetic simulations using the Nmag modeling package. A large number ofmodeling studies on such arrays of nanowires have been performed using finitesize models. We show that these finite size micromagnetic descriptions can onlybe used in specific situations. We perform a systematic study of more or lessdense 1D and 2D arrays of nanowires using either finite size or infinite sizemodels and we show that finite size models fail to capture some of the featuresof real infinite systems. We show that that the mean field model scaled to thesystem porosity is valid. This work can be used as a basis to the extension ofmicromagnetic calculations of the magnetization dynamics in arrays ofnanowires.
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