The measurement of low-angle structure factors of Cu3Au by high energy electron diffraction

Publisher Website
Google Scholar
Abstract
The low-angle structure factors in ordered and disordered Cu3Au have been measured by high energy electron diffraction (HEED). The results indicate that the electron charge distribution around the copper atoms is made more nearly spherical by the addition of gold atoms, in agreement with previous elastic constant data. A simple nearest-neighbour force constant model was used to analyse the Debye-Waller factor changes associated with ordering, and this indicates that ordering in Cu3Au arises from a combination of strain relief due to atomic radius mismatch and interatomic force constant changes.