An experimental investigation of ultrathin metallic films on face centred
cubic(111) surfaces using medium energy ion scattering as a primary experimental
technique is reported. A suite of custom software written for data-processing,
calibration and analysis has also been described. The specific
experimental systems investigated are 0.25 ML to 3.89 ML of palladium on
copper(111) and 0.23 ML to 3.74 ML of silver on aluminium(111).
The Pd CU(111) system was shown to exhibit 42% twinning at 0.25 ML
through 4.74 ML. At 0.25 ML coverage it has been shown that the Pd migrates
into the top three layers of the substrate. The Pd was shown to be
distributed 27% ± 3%, 67% ± 3% and 6% ± 3% in the 1st, 2nd and 3rd layers.
The first and second interlayer spacings we also found to contract by 4% and
expand by 4% respectively for the 0.25 ML coverage. [Continues.]
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.