Magnetic moment of rare-earth elements in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Fe</mml:mi><mml:mn>14</mml:mn></mml:msub><mml:mi mathvariant="normal">B</mml:mi></mml:mrow></mml:math> estimated with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mi>SR</mml:mi></mml:mrow></mml:math>
Bibliographic record
Abstract
The ferromagnetic (FM) nature of ${\mathrm{Nd}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$ has been investigated with muon spin rotation and relaxation (${\ensuremath{\mu}}^{+}\mathrm{SR}$) measurements on an aligned, sintered plate-shaped sample. A clear muon spin precession frequency (${f}_{\mathrm{FM}}$) corresponding to the static internal FM field at the muon site showed an order parameter-like temperature dependence and disappeared above around 582 K ($\ensuremath{\sim}{T}_{\mathrm{C}}$). This indicated that the implanted muons are static in the ${\mathrm{Nd}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$ lattice even at temperatures above around 600 K. Using the muon site and local spin densities predicted by DFT calculations, the ordered Nd moment (${M}_{\mathrm{Nd}}$) was estimated to be 3.31 ${\ensuremath{\mu}}_{\mathrm{B}}$ at 5 K, when both ${\mathbit{M}}_{\mathrm{Fe}}$ and ${\mathbit{M}}_{\mathrm{Nd}}$ are parallel to the $\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{\mathbf{c}}$ axis and ${M}_{\mathrm{Fe}}=2.1\phantom{\rule{0.16em}{0ex}}{\ensuremath{\mu}}_{\mathrm{B}}$. Furthermore, ${M}_{R}$ in ${R}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$ with $R=\mathrm{Y}$, Ce, Pr, Sm, Gd, Tb, Dy, Ho, Er, and Tm was estimated from ${f}_{\ensuremath{\mu}}$ values reported in earlier ${\ensuremath{\mu}}^{+}\mathrm{SR}$ work, using the FM structure proposed by neutron scattering and the same muon site and local spin density as in ${\mathrm{Nd}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$. Such estimations yielded ${M}_{R}$ values consistent with those obtained by the other methods.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.196 | 0.054 |
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".