抄録
We have carried out neutron diffraction experiments in order to study on the intermediate phase of the mixed system, U(Ru1-xRhx)2Si2, of URu2Si2 and URh2Si2, which are a heavy Fermion and a localized f-electron compounds, respectively. In the intermediate phase, the magnetic moment of the uranium atom has a normal magnitude but the ground state has a complex multi-Q-domain structure. The origin of this state is discussed on the basis of competing anisotropic interactions and randomness in them. An energy-based consideration is given to understand the variation of the magnetic structures in U(Ru1-xRhx)2Si2 and Ce(Ru1-xRhx)2Si2 sytems.
