Find datasets and a basic GenX file for fitting some simple XRR examples here.
This dataset includes:
- Glass substrate data and basic GenX file
- Approximately 15nm Cu on glass
- Approximately 30nm Nb on glass
- Approximately 20nm Ta on glass
- Approximately 25nm Ta on glass
- Approximately 80 nm Fe3O4 on glass
- Approximately [80nm:5nm] [Fe3O4:Pt] bilayer on glass
Notice that for the first initial fit you want to stay as close to the ‘guess’ of the sample as possible. (i.e. for (4) start with 1 layer on glass). You will find that to get the data to fit you may need to increase layers for interdiffusion or oxide at a sample surface.
Some useful information:
Material | Density (g/cm3) | Atomic weight | Number density (atoms/A) |
SiO2 | 2.3 | 60.084 | 0.02305 |
Cu | 8.96 | 63.5 | 0.08497 |
Nb | 8.57 | 92.906 | 0.05555 |
Ta | 16.7 | 180.95 | 0.05558 |
Fe3O4 | 5.17 | 231.537 | 0.01345 |
Pt | 21.45 | 195.08 | 0.06622 |
Solutions available on request.