Rare‐Earth Cobalt Gallides RE<sub>4</sub>Co<sub>3</sub>Ga<sub>16</sub> (RE = Gd–Er, Y): Self‐Interstitial Derivatives of RE<sub>2</sub>CoGa<sub>8</sub>
Bibliographic record
Abstract
Abstract Ternary rare‐earth cobalt gallides RE4Co3Ga16 (RE = Gd–Er, Y) have been prepared by arc‐melting of the elements followed by annealing at 800 °C. Single crystals of the Gd and Tb members were also grown in the presence of a Ga self‐flux. They extend the rare‐earth substitution possible in the Sm4Co3Ga16‐type structure (Pearson symbol tP23, space group P4/mmm, Z = 1), in which additional Co atoms enter as self‐interstitials into the parent RE2CoGa8 structure. Structural refinements were carried out on single‐crystal (RE = Gd, Tb) and powder (RE = Dy, Ho, Er, Y) X‐ray diffraction data. Cell parameters lie in the ranges of a = 6.03–5.96 Å and c = 11.11–10.96 Å. Magnetic measurements on RE4Co3Ga16 (RE = Gd, Tb, Dy) reveal that they order antiferromagnetically below TN of 19, 25, and 14 K, respectively; Y4Co3Ga16 is Pauli paramagnetic. The electrical resistivity of Tb4Co3Ga16 undergoes a transition coincident with the magnetic ordering temperature. Band structure calculations on Y4Co3Ga16 indicate that the major bonding contributions arise from Co–Ga and Ga–Ga interactions, with the stuffing of interstitial Co atoms into octahedral sites of the parent Y2CoGa8 structure, which provides additional Co–Ga bonding stabilization.
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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 | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".