Bulk domain sizes determined by complementary scattering methods in polycrystalline Fe

This work gives an experimental comparison between neutron depolarization and the small-angle scattering for the determination of magnetic domains. As sample several foils of rolled, highly pure Fe were used. The magnetic domain size was determined by three-dimensional neutron depolarization (ND) and by ultra small-angle neutron scattering (USANS). In the virgin sample, the overall mean domain size equals about 2.8 μm determined by ND. The mean radius of magnetic scattering determined by USANS equals 3.0 μm for volume weighted region. There is fair agreement in determining the magnetic domains in the range of several microns between the methods assuming either depolarization or USANS