Diffusive motions in a crystalline Al50Cu35Ni15 alloy

In this report, quasielastic neutron scattering experiments on the Al50Cu35Ni15 alloy are briefly described. It is found that frequent jumps of Cu and Ni atoms between different interstitial lattice positions are taking place in this alloy at high temperature indicating that hopping motions are not restricted to occur in systems with quasicrystalline local order.