Abstract
Grazing-incidence x-ray scattering (GIXS) techniques have been used to study the local and intermediate-range order in photodiffused amorphous Ag- thin films and a variety of Ag-Ge-Se alloys. Using synchrotron-radiation sources, the GIXS technique can be used in conjunction with radial-distribution-function analysis, differential anomalous x-ray scattering, and differential distribution-function analysis to study the structure of very thin amorphous films. With these techniques, we have determined that the local atomic structure of Ag- films satisfies a model where Se-Ag dative bonds are formed, one Se-Ag covalent bond is formed for each Ag atom added (below a critical composition), and Ge-Ge bonds are created as Ag is added. This last result significantly modifies the intermediate-range order in this system.
- Received 10 August 1988
DOI:https://doi.org/10.1103/PhysRevB.38.12388
©1988 American Physical Society