NONCOLLINEAR SPIN STRUCTURES IN CEH2 FE

In the present study we have investigated the interlayer coupling in C eH2/Fe multilayers by neutron reflectometry. For a wide range of inter layer thicknesses we observe an exchange coupling of the iron layers t hrough the nonmagnetic CeH2 spacer. In addition to a ferro- and antife rromagnetic alignment of the moments the neutron spectra give evidence of a long-periodic magnetic structure which is identified to be an an tiferromagnetic fan-like arrangement of the magnetization vectors in a djacent Fe layers.