Electric quadrupole interaction of 111Cd in (Ce1−xLax)Ru2 and (Ce1−yCay)Ru2 synthesized at high pressure

Quasibinary Laves systems (Ce1−xLax)Ru2 and (Ce1−yCay)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 νQ≅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 (Ce1−yCay)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.