Magnetic field induced effects in the quasikagome Kondo lattice system CePtPb
Bibliographic record
Abstract
The Kondo lattice compound CePtPb crystallizes in the ZrNiAl-type structure with the space group $P\overline{6}2m$, where the ${\mathrm{Ce}}^{3+}$ ions form a quasikagome lattice in the $ab$ plane. We have constructed a temperature versus magnetic field ($T\text{\ensuremath{-}}H$) phase diagram for single-crystal CePtPb from electrical resistivity and specific heat measurements. Our results indicate the occurrence of long-range antiferromagnetic order below ${T}_{\mathrm{N}}=0.95\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ and multiple magnetically ordered phases as ${T}_{\mathrm{N}}$ is suppressed by applied magnetic field. Although ${T}_{\mathrm{N}}$ can be continuously suppressed to zero by the field, the resistivity and specific heat close to the critical field ${H}_{c}\ensuremath{\approx}6$ kOe do not follow simple models of quantum criticality. Above ${H}_{c}$, the electrical resistivity shows an unconventional ${T}^{n}$ dependence with $n>2$. We also present muon spin relaxation measurements, which reveal residual spin dynamics below ${T}_{\mathrm{N}}$ that are consistent with only two thirds of the Ce-$4f$ spins participating in the antiferromagnetic order.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".