Conduction-electron scattering in quenched and annealed gold

The anisotropy of conduction-electron scattering due to vacancies and stacking-fault tetrahedra (SFT) in quenching and subsequently annealing gold single crystals has been studied by measuring the de Haas-van Alphen (dHvA) Dingle(scattering) temperatures T/sub D/ for a large number of cyclotron orbits. The samples were quenched from 9000C into ice water, and were later annealed at 23 and 400C. We find that the dHvA scattering rates 1/tau/sub dHvA/ due to both vacancies and SFT are much larger than those obtained from resistivity measurements 1/tau/sub rho/. The ratio of the [111] neck to belly orbital scattering rate rises from 1.0 for vacancies to 3.5 for SFT. This rise is attributed to the stronger and longer range strain field associated with the larger defects. We have calculated the local lifetimes tau(k) from the measured T/sub D/ and found a large scattering anisotropy with strongest scattering arising from the [100] region