Magnetization dynamics of interacting iron nanocrystals in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Si</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
Why this work is in the frame
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Bibliographic record
Abstract
We find that ensembles of iron nanocrystals embedded within a matrix of $\mathrm{Si}{\mathrm{O}}_{2}$ exhibit both a large Faraday rotation and ultrafast magnetic relaxation. The Verdet constant is $6.3\ifmmode^\circ\else\textdegree\fi{}\ifmmode\pm\else\textpm\fi{}0.4\ifmmode^\circ\else\textdegree\fi{}∕\mathrm{cm}∕\mathrm{Oe}$ and a still-unsaturated Faraday rotation of $3.8\ifmmode^\circ\else\textdegree\fi{}\ifmmode\pm\else\textpm\fi{}0.2\ifmmode^\circ\else\textdegree\fi{}∕\ensuremath{\mu}\mathrm{m}$ was observed at a wavelength of $532\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ for a specimen containing nanocrystals ranging up to $20\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ in diameter. The dynamic response of the nanocrystals to a transient magnetic field produced by a current pulse propagating through a lithographically patterned wire was probed using time-resolved magneto-optical Kerr-effect microscopy. The rise time of the magnetic response to a transient out-of-plane field was observed to be as fast as $26\phantom{\rule{0.3em}{0ex}}\mathrm{ps}$. Magnetostatic interactions between nanoparticles play a significant role in determining the observed static and dynamic properties of the nanocomposite.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.077 | 0.002 |
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