  Magnetic force microscopy and scanning tunneling microscopy data could be
used to test computer numerical models of magnetism. The elaborated numerical
model of a face-centered lattice Ising spins is based on pixel distribution in
the image of magnetic nanostructures obtained by using scanning microscope.
Monte Carlo simulation of the magnetic structure model allowed defining the
temperature dependence of magnetization; calculating magnetic hysteresis curves
and distribution of magnetization on the surface of submonolayer and monolayer
nanofilms of cobalt, depending on the experimental conditions. Our developed
package of supercomputer parallel software destined for a numerical simulation
of the magnetic-force experiments and allows obtaining the distribution of
magnetization in one-dimensional arrays of nanodots and on their basis. There
has been determined interpretation of magneto-force microscopy images of
magnetic nanodots states. The results of supercomputer simulations and
numerical calculations are in the good compliance with experimental data.
