Magnetic properties of mixed uranium and 3d element chalcogenides of the MU8X17 type

Magnetic susceptibility measurements in the temperature range 4.2–300°K for the MU₈X₁₇ type chalcogenides, where M is a 3d transition metal or Mg, and X = S or Se, were carried out. For comparison, the magnetic properties of UTe₂ are also given. Almost all the mixed uranium and 3d-transition element chalcogenides are induced-antiferromagnets, as indicated from the occurrence of the susceptibility maxima on the χ vs. T curves and large negative values of the paramagnetic Curie temperatures. The influence of the 3d-transition metals on setting up the magnetic order in the MU₈X₁₇-type compounds is discussed.