  We discuss time-quantified Monte-Carlo simulations on classical spin chains
with uniaxial anisotropy in relation to static calculations. Depending on the
thickness of domain walls, controlled by the relative strength of the exchange
and magnetic anisotropy energy, we found two distinct regimes in which both the
static and dynamic behavior are different. For broad domain walls, the
interplay between localized excitations and spin waves turns out to be crucial
at finite temperature. As a consequence, a different protocol should be
followed in the experimental characterization of slow-relaxing spin chains with
broad domain walls with respect to the usual Ising limit.
