Ion-Beam Bombarded SiO<sub>2</sub> Layer Effects on the Microstructure and Magnetism in FePt/SiO<sub>2</sub> Bilayers
Bibliographic record
Abstract
We have shown that the structural and magnetic properties of FePt thin films were affected strongly by capped SiO2 layers prepared by ion-beam bombardment followed by post-annealing. Compared to the single fcc FePt phase in the as-deposited FePt/SiO2 bilayer (0% O2/Ar), annealing at 550 °C produced an ordered L 10 FePt phase with enhanced coercivity (∼14 kOe). Increasing the %O2/Ar during deposition of the top SiO2 layer resulted in smaller ordered FePt grains separated by grain boundaries of SiO2. We find that the (001) diffraction peak is broadened considerably with larger SiO2 deposition %O2/Ar and annealing, likely due to the induced strain. Our results indicate that FePt/SiO2 films deposited with lower %O2/Ar, the oxygen atoms created by the ion-beam bombardment act effectively to inhibit the FePt grain growth, whereas the excess oxygen atoms present during film deposition with higher %O2/Ar may induce a local strain on the FePt crystallites by occupying the interstitial sites in the FePt lattice.
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How this classification was reachedexpand
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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".