Speaker
Prof.
Joseph Asante
(Tshwane University of Technology)
Description
A Cu(111) and Cu(100) were thermally doped with the same concentrations of Sn (0.14 at%) and Sb (0.12 at%) in both crystals. Auger electron spectroscopy was used to measure the segregation profiles. The segregation parameters of Sn and Sb were extracted by comparing simulated profiles with the experimental data.
The segregation profiles in the two crystals were compared and it was found that the profiles of both Sn and Sb in Cu(111) shifts to lower temperatures than those in Cu(100). The quantified segregation parameters were used to explain the shift. It is argued that changes in the pre-exponential diffusion factors, rather than the activation energies, is the main contributing parameter.
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
N/A
Apply to be<br> considered for a student <br> award (Yes / No)?
No
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes
Primary author
Prof.
Joseph Asante
(Tshwane University of Technology)
Co-author
Prof.
Wiets Roos
(University of the Free State)
Peer reviewing
Paper
Paper files:
