Influence of crystalline electric field on the magnetic properties of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>CeCd</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>X</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mspace width="0.28em"/><mml:mrow><mml:mo>(</mml:mo><mml:mi>X</mml:mi><mml:mo>=</mml:mo><mml:mrow><mml:mi mathvariant="normal">P</mml:mi><mml:mo>,</mml:mo><mml:mi>As</mml:mi></mml:mrow><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>
Bibliographic record
Abstract
${\mathrm{CeCd}}_{3}{\mathrm{P}}_{3}$ and ${\mathrm{CeCd}}_{3}{\mathrm{As}}_{3}$ compounds adopt the hexagonal ${\mathrm{ScAl}}_{3}{\mathrm{C}}_{3}$-type structure, where magnetic Ce ions on a triangular lattice order antiferromagnetically below ${T}_{\text{N}}\ensuremath{\sim}0.42$ K. Their crystalline electric field (CEF) level scheme has been determined by fitting magnetic susceptibility curves, magnetization isotherms, and Schottky anomalies in specific heat. The calculated results, incorporating the CEF excitation, Zeeman splitting, and molecular field, are in good agreement with the experimental data. The CEF model, with ${\mathrm{Ce}}^{3+}$ ions in a trigonal symmetry, explains the strong easy-plane magnetic anisotropy that has been observed in this family of materials. A detailed examination of the CEF parameters suggests that the fourth-order CEF parameter ${B}_{4}^{3}$ is responsible for the strong CEF-induced magnetocrystalline anisotropy, with a large $ab$-plane moment and a small $c$-axis moment. The reliability of our CEF analysis is assessed by comparing the current study with earlier reports of ${\mathrm{CeCd}}_{3}{\mathrm{As}}_{3}$. For both ${\mathrm{CeCd}}_{3}{X}_{3}$ ($X=\mathrm{P}$ and As) compounds, less than 40% of $Rln(2)$ magnetic entropy is recovered by ${T}_{\text{N}}$ and full $Rln(2)$ entropy is achieved at the Weiss temperature ${\ensuremath{\theta}}_{p}$. Although the observed magnetic entropy is reminiscent of delocalized $4f$-electron magnetism with significant Kondo screening, the electrical resistivity of these compounds follows a typical metallic behavior. Measurements of thermoelectric power further validate the absence of a Kondo contribution in ${\mathrm{CeCd}}_{3}{X}_{3}$.
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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) | 0.000 | 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 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.020 | 0.002 |
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".