Magnetostatic interactions in a natural magnetite‐ulvöspinel system
Bibliographic record
Abstract
Magnetostatic interactions have been investigated in an intergrown material consisting of ∼200‐nm magnetite blocks separated by ∼30‐nm‐wide ulvöspinel lamellae. First‐order reversal curve (FORC) measurements provide a direct measure of the interaction fields, giving a value for the full width at half maximum (FWHM) of 30 mT (at H c = 20 mT). Hysteresis parameters are M rs / M s = 0.22, H cr / H c = 1.98 and transient energy dissipation (TED) = 0.18. Elimination of the intergrowth structure (by heating in vacuo) causes the FORC contours to shrink down toward the origin, yielding FWHM = 14 mT (at H c = 6 mT) with corresponding changes in M rs / M s , H cr / H c and TED to 0.11, 2.73 and 0.28, respectively. All these characteristics reveal the strong influence of particle‐to‐particle magnetostatic interactions between the magnetite blocks in the starting material and demonstrate the change from single‐domain/pseudosingle‐domain to multidomain behavior due to the fundamental structural change brought about by the experimental homogenization. Micromagnetic calculations of particle assemblages representative for the intergrown structure confirm that the magnetite blocks will interact by assuming a supervortex magnetization structure.
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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 | 0.001 |
| 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".