  The in-plane correlation lengths and magnetic disorder of magnetic domains in
a transition metal multilayer have been studied using neutron scattering
techniques. A new theoretical framework is presented connecting the observed
scattering to the in-plane correlation length and the dispersion of the local
magnetization vector about the mean macroscopic direction. The results
unambiguously show the highly correlated nature of the antiferromagnetically
coupled domain structure vertically throughout the multilayer. We are easily
able to relate the neutron determined magnetic dispersion and domain
correlations to magnetization and magnetotransport experiments.
