ELASTIC AND INELASTIC NEUTRON-SCATTERING ON NDNI1-XCUX

The magnetic structures and the crystalline electric field (CEF) excit ations of NdNi1-xCux compounds were studied by means of neutron scatte ring experiments. While a FxCz ferromagnetic ordering is found for x l ess than or equal to 0.7, NdNi0.2Cu0.8 presents a conical arrangement of the magnetic moments, and for x = 0.9 and 1, incommensurate antifer romagnetic structures with several propagation vectors are found. On t he other hand, INS spectra show some significant changes in the positi on of the CEF excitations when Ni is substituted by Cu.