Interaction of repulsive impurity pairs in silver

Probe-impurity interactions of In–Cd and In–Zn pairs in silver matrix have been studied using ¹¹¹In-TDPAC measurements. The interactions are repulsive for both the pairs. For 3% alloys, the interaction energy of In–Cd pairs in Ag is 51± 2 meV and that of In–Zn pairs is 19± 1 meV. The Electric Field Gradient (EFG) at ¹¹¹Cd due to a single Cd nn impurity to the In probe is found to be 0.83± 0.04× 10²¹ V/m² while for a Zn impurity is 1.50± 0.05× 10²¹ V/m². Cd–Cd contact interaction in silver is also found to be repulsive. This revised version was published online in August 2006 with corrections to the Cover Date.