Electric quadrupole interaction of Cd in (Ce1−xLax)Ru2 and (Ce1−yCay)Ru2 synthesized at high pressure

Quasibinary Laves systems (Ce_1−xLa_x)Ru₂ and (Ce_1−yCa_y)Ru₂ doped with ¹¹¹In were synthesized at a pressure of 8 GPa, and variations of the electric quadrupole interaction of ¹¹¹Cd at the Ru sites have been studied by the method of time-differential perturbed angular correlation in a wide range of Ce-La and Ce-Ca relative concentrations. In the first case two sites with quadrupole frequencies ν_Q≅220 and 150 MHz persist at x≤0.2, while at x≥0.3 only the higher frequency component remains in the spectra, which are similar to that of pure LaRu₂. In the series (Ce_1−yCa_y)Ru₂, at y≥0.03 the lower frequency component was washed out except in samples with y=0.1 and 0.2, where it was restored.