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| Hauptseite > Publikationsdatenbank > Quantitative HAADF STEM of SiGe in presence of amorphous surface layers from FIB preparation > print |
| Hauptseite > Publikationsdatenbank > Quantitative HAADF STEM of SiGe in presence of amorphous surface layers from FIB preparation > print |
| 001 | 850203 | ||
| 005 | 20210129234527.0 | ||
| 024 | 7 | _ | |a 10.1016/j.ultramic.2017.09.012 |2 doi |
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| 041 | _ | _ | |a English |
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| 100 | 1 | _ | |a Grieb, Tim |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Quantitative HAADF STEM of SiGe in presence of amorphous surface layers from FIB preparation |
| 260 | _ | _ | |a Amsterdam |c 2018 |b Elsevier Science |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a The chemical composition of four SiGex layers grown on silicon was determined from quantitative scanning transmission electron microscopy (STEM). The chemical analysis was performed by a comparison of the high-angle annular dark field (HAADF) intensity with multislice simulations. It could be shown that amorphous surface layers originating from the preparation process by focused-ion beam (FIB) at 30 kV have a strong influence on the quantification: the local specimen thickness is overestimated by approximately a factor of two, and the germanium concentration is substantially underestimated. By means of simulations, the effect of amorphous surface layers on the HAADF intensity of crystalline silicon and germanium is investigated. Based on these simulations, a method is developed to analyze the experimental HAADF-STEM images by taking the influence of the amorphous layers into account which is done by a reduction of the intensities by multiplication with a constant factor. This suggested modified HAADF analysis gives germanium concentrations which are in agreement with the nominal values. The same TEM lamella was treated with low-voltage ion milling which removed the amorphous surface layers completely. The results from subsequent quantitative HAADF analyses are in agreement with the nominal concentrations which validates the applicability of the used frozen-lattice based multislice simulations to describe the HAADF scattering of SiGex in STEM. |
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| 700 | 1 | _ | |a Tewes, Moritz |0 P:(DE-HGF)0 |b 1 |
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| 700 | 1 | _ | |a Müller-Caspary, Knut |0 P:(DE-Juel1)165314 |b 3 |
| 700 | 1 | _ | |a Krause, Florian F. |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Mehrtens, Thorsten |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Hartmann, Jean Michel |0 P:(DE-HGF)0 |b 6 |
| 700 | 1 | _ | |a Rosenauer, Andreas |0 P:(DE-HGF)0 |b 7 |
| 773 | _ | _ | |a 10.1016/j.ultramic.2017.09.012 |0 PERI:(DE-600)1479043-9 |n Part B |p 29 - 36 |t Ultramicroscopy |v 184 |y 2018 |x 0304-3991 |
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