  Ordered ferromagnetic nanowire arrays are widely studied due to the diversity
of possible applications. However, there is still no complete understanding of
the relation between the array's parameters and its magnetic behavior. The
effect of vortex states on the magnetization reversal of large-diameter
nanowires is of particular interest. Here, we compare analytical and
micromagnetic models with experimental results for three arrays of iron
nanowires with diameters of 33, 52 and 70 nm in order to find the balance
between the number of approximations and resources used for the calculations.
The influence of the vortex states and the effect of interwire interactions on
the remagnetization curves is discussed. It has been found that 7 nanowires
treated by a mean field model are able to reproduce well the reversal behaviour
of the whole array in the case of large diameter nanowires. Vortex states tend
to decrease the influence of the structural inhomogeneities on reversal process
and thus lead to the increased predictability of the system.
