Grazing incidence neutron diffraction from ferromagnetic films in multi-domain state

Bragg diffraction at grazing incidence of neutrons from a magnetic film decomposed into a set of ferromagnetic domains is considered within the frame of the distorted wave Born approximation. It is shown that the diffracted intensity measured as a function of angles of incidence and exit in the direction normal to the surface can provide information on the lateral distribution of domain magnetization. Theoretical results are illustrated by measurements of a mono-crystalline film of iron.