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 SiO 2 layers prepared by ion-beam bombardment followed by post-annealing. Compared to the single fcc FePt phase in the as-deposited FePt/SiO 2 bilayer (0% O 2 /Ar), annealing at 550 °C produced an ordered L 1 0 FePt phase with enhanced coercivity (∼14 kOe). Increasing the %O 2 /Ar during deposition of the top SiO 2 layer resulted in smaller ordered FePt grains separated by grain boundaries of SiO 2 . We find that the (001) diffraction peak is broadened considerably with larger SiO 2 deposition %O 2 /Ar and annealing, likely due to the induced strain. Our results indicate that FePt/SiO 2 films deposited with lower %O 2 /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 %O 2 /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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".