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http://hdl.handle.net/10773/20495| Title: | Composition measurement of epitaxial ScxGa1-xN films |
| Author: | Tsui, H. C. L. Goff, L. E. Barradas, N. P. Alves, E. Pereira, S. Palgrave, R. G. Davies, R. J. Beere, H. E. Farrer, I. Ritchie, D. A. Moram, M. A. |
| Keywords: | SCANDIUM NITRIDE FILMS THIN-FILMS BAND-GAP INGAN EPILAYERS GROWTH SCGAN MICROSTRUCTURE SURFACE PLASMA LAYERS |
| Issue Date: | 2016 |
| Publisher: | IOP PUBLISHING LTD |
| Abstract: | Four different methods for measuring the compositions of epitaxial ScxGa1-xN films were assessed and compared to determine which was the most reliable and accurate. The compositions of epitaxial ScxGa1-xN films with 0 <= x <= 0.26 were measured directly using Rutherford backscattering (RBS) and x-ray photoelectron spectroscopy (XPS), and indirectly using c lattice parameter measurements from x-ray diffraction and c/a ratio measurements from electron diffraction patterns. RBS measurements were taken as a standard reference. XPS was found to underestimate the Sc content, whereas c lattice parameter and c/a ratio were not reliable for composition determination due to the unknown degree of strain relaxation in the film. However, the Sc flux used during growth was found to relate linearly with x and could be used to estimate the Sc content. |
| Peer review: | yes |
| URI: | http://hdl.handle.net/10773/20495 |
| DOI: | 10.1088/0268-1242/31/6/064002 |
| ISSN: | 0268-1242 |
| Publisher Version: | 10.1088/0268-1242/31/6/064002 |
| Appears in Collections: | CICECO - Artigos |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Composition measurement of epitaxial ScxGa1-xN films_10.10880268-1242316064002.pdf | 763.77 kB | Adobe PDF |  |
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