Neutron elastic and inelastic scattering investigations of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">U</mml:mi></mml:mrow><mml:mrow><mml:mn>0.965</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Th</mml:mi></mml:mrow><mml:mrow><mml:mn>0.035</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Be</mml:mi></mml:mrow><mml:mrow><mml:mn>13</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Bibliographic record
Abstract
Single crystals of the heavy-fermion superconductor ${\mathrm{UBe}}_{13}$ doped with 3.5% Th have been studied by neutron scattering techniques. This material undergoes two superconducting transitions at ${T}_{c1}\ensuremath{\cong}0.55$ and ${T}_{c2}\ensuremath{\cong}0.40\mathrm{K}.$ Using elastic neutron scattering we found no evidence for either short- or long-range magnetic order down to temperatures of 0.15 K. Similarly, exhaustive scans at reasonably high values of the momentum transfer found no evidence of a recently predicted internal lattice rearrangement of the Be nuclei at low temperatures. However, using neutron inelastic scattering we did find weak signals with a propagation direction $\mathbf{q}=〈0.5 0.5 0〉,$ indicating antiferromagnetic fluctuations that are short range in real space, and are also short lived. These correlations disappear only above about 30 K, similar to effects found in pure ${\mathrm{UBe}}_{13}.$ They also show no variation on passing through ${T}_{c}.$
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.002 | 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) | 0.027 | 0.006 |
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".