Magnetic properties of Fe nanodots are simulated using a scaling technique and Monte
Carlo method, in good agreement with experimental results. For the 20-nm-thick dots with
diameters larger than 60 nm⁠, the magnetization reversal via vortex state is observed. The
role of magnetic interaction between dots in arrays in the reversal process is studied as a
function of nanometric center-to-center distance. When this distance is more than twice the
dot diameter, the interaction can be neglected and the magnetic properties of the entire …