Quadrupole interactions at 111Cd probe nuclei were studied, at temperatures ranging from 30 to 1100K, by using a time differential perturbed angular correlation technique. A highly asymmetrical electric field gradient, with an asymmetry parameter equal to unity, implied Cu(1) site occupancy of the parent 111In atoms. The quadrupolar relaxation was attributed to a time-dependent component of the electric field gradient which was due to the hopping motion of O atoms. The activation energy for O jumps was estimated, on the basis of the variation in the relaxation parameter with temperature, to be 0.033eV.

P.Singh, M.N.Nyayate, S.H.Devare, H.G.Devare: Physical Review B, 1989, 39[4], 2308-11