The thermally-induced reaction of thin Ni films with Si: Effect of the substrate orientation
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Bibliographic record
Abstract
The solid-state reaction between thin Ni films and Si substrates was investigated using in situ synchrotron x-ray diffraction as well as ex situ three-dimensional reciprocal space maps and transmission electron microscopy analyses. Our results indicate that the orientation of the crystalline Si substrate strongly affects the reaction pathways, thereby altering the phase formation sequence upon annealing. On Si(001), the reaction begins with the formation of orthorhombic Ni2Si grains having a strong fiber texture. The metastable hexagonal θ phase and the NiSi phase then form through texture inheritance. The reaction on Si(111) is characterized by the appearance of multiple epitaxial phases. The as-prepared Ni samples contain a small amount of θ. Upon annealing, epitaxially textured Ni2Si along with other very thin epitaxial interfacial layers that may contain NiSi2 first appear. Once Ni2Si has completely consumed Ni, epitaxial Ni3Si2 grows while the complete consumption of Ni2Si triggers the formation of NiSi. Texture inheritance on Si(001) facilitates the nucleation and growth of NiSi, thus explaining the lower formation temperature on Si(001) than on Si(111).
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it