Dynamical properties of spherical ferromagnetic nanoparticles
Bibliographic record
Abstract
Calculations are presented for the dipole-exchange spin waves in spherical ferromagnetic nanoparticles such as solid spheres, part spheres, and spherical shells using a microscopic (or Hamiltonian-based) method. The magnetic dipolar and exchange interactions are incorporated, as well as a Zeeman term for an external magnetic field. The theory is particularly convenient, by contrast with macroscopic theories, for describing the dynamics of inhomogeneously magnetized samples, and it avoids using phenomenological boundary conditions. The Green’s function method yields results for the frequencies, spatial distribution, and spectral intensities of the spin waves. Applications are made to Fe19Ni81 and Co80Ni20 nanoparticles with diameters in the range of 10–100nm. The mode-mixing (hybridization) effects on the spin-wave branches are shown to be important.
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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) | 0.000 | 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 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".