Vacancies in homoepitaxially grown Ag(001): a diffuse x-ray scattering study
Abstract
Recently, it was demonstrated that a large concentration of vacancies is incorporated and trapped during the homoepitaxial growth of noble metals at low temperature [Appl. Phys. Lett. 81, 4718 (2002)] and that significant changes in the surface morphology are observed concomitantly with their incorporation. Thus, it is of interest to understand the underlying mechanism of incorporation and how it might be related to the surface kinetics. In the present work, in situ diffuse x-ray scattering experiments using synchrotron radiation investigate the size of vacancy clusters in homoepitaxially grown Ag(001). Near the Bragg reflections Huang-type scattering is observed with a Stokes-Wilson form observed further from the reflection. However, extensive measurements to high wavevectors, for several orders of Bragg reflections, reveal complex behavior. The experiments, the analysis, and the implications for cluster size will be discussed. Research funding from NSF & MU Research Board. DoE supports the Advanced Photon Source and the MUCAT beamline at the APS is supported by DoE through the Ames Lab.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2004
- Bibcode:
- 2004APS..MARA32006K