Spin-glass-like behaviour of a collection of nano-granular magnetic particles embedded in an insulating thin film and interacting only via dipolar forces
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Bibliographic record
Abstract
We perform Metropolis Monte Carlo simulations of the behaviour of a film of insulating material containing a distribution of magnetic nanoparticles. We assume that these particles only interact through dipolar forces and we find that their behaviour at low temperatures shows characteristics of a spin-glass with a freezing temperature at which the linear susceptibility and the specific heat exhibit a maximum. We define an order parameter which shows a similar dependence on the temperature to the one expected for a spin-glass . We also calculate the correlation of the orientation of the magnetic dipole at the center of the system at different times. All our results are consistent with the temperature dependence of the variance and the mean of the local field acting on the central dipole. Furthermore, the total magnetic dipole of the system scales with the square root of the number of particles, which indicates that the dipole orientations are randomly distributed, as expected for a spin-glass.
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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