Abstract

Neutron powder diffraction and zero-field μSR studies of U(Ni x Cu 1− x ) 2Si 2 with x = 0 and 0.25 have been performed. These compounds have different types of AF ordering below T N ∼ 1 2 0 K . Muon precession has been observed in both samples. Neutron diffraction together with μSR analysis have shown us changing between incommensurate phase and simple AF with the changes of temperature. Possible mechanisms of magnetic ordering are discussed.

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