Exchange interaction in GdT2 (T=Fe,Co,Ni) from first-principles
Bibliographic record
Abstract
The intersites exchange coupling parameters Jij of the Heisenberg model have been studied from a first-principles density functional plus Hubbard U approach calculation and a linear-response method for GdT2 Laves phase with T=Co, Fe, and Ni. The calculated magnetic moments of Gd are well localized and range from 7.3μB to 7.8μB, while the moments of Fe, Co, and Ni are −1.96μB, −1.19μB, and −0.11μB, respectively. The calculated effective exchange interaction parameters J0 of Gd sublattices are 2.62, 1.95, and 1.00 mRy, while those of T sublattices are 6.92, 4.37, and 0.00 mRy for T=Fe, Co, and Ni, respectively. The calculation results indicate that the magnetic ordering is dominated by the Gd sublattice in GdNi2, while the magnetic ordering is mainly determined by the Fe-sublattice in GdFe2.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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 | 0.001 |
| 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 teacher head, 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".