  We report a Monte Carlo investigation of the effect of a lattice of antidots
on spin relaxation in twodimensional electron systems. The spin relaxation time
is calculated as a function of geometrical parameters describing the antidot
lattice, namely, the antidot radius and the distance between their centers. It
is shown that spin polarization relaxation can be efficiently suppressed by the
chaotic spatial motion due to the antidot lattice. This phenomenon offers a new
approach to spin coherence manipulation in spintronics devices.
