Magnetic susceptibility of U1-xGdxO2 solid solution

Magnetic susceptibility was measured on the samples of U1-xGdxO2 prepared by a coprecipitation method from 1.7 K to room temperature. The behavior of magnetic susceptibility is contributed almost from trivalent gadolinium ion because of its very large spin magnetic moment of 8S. For x < approx 40 %, the magnetic susceptibility-temperature curve obeyed Curie-Weiss law and values of magnetic susceptibility increase linearly with increasing gadolinium concentrations. For the higher concentrations of gadolinium the magnetic susceptibility-temperature curve has a peak at 3 ∼ 4 K, showing a magnetic field dependence of magnetic susceptibility at liquid helium temperature which would be expected for the case of a weak magnetic anisotropy in antiferromagnets. (author)