First-order transition in frustrated Yb<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> without long-range order
Bibliographic record
Abstract
We have examined the pyrochlore lattice compound Yb2Ti2O7 using 170Yb Mössbauer spectroscopy and neutron diffraction. The Yb3+ ion has a well-isolated S' = 1/2 ground state with planar anisotropy and the net interaction is ferromagnetic. The Mössbauer measurements show that short-range correlations develop below about 2 K and at 0.2 K, where specific heat data evidence a λ-transition (Blöte et al. Physica, 43, 549 (1969)), there is a first-order transition to a state where the Yb3+ moments become blocked on the Mössbauer time scale (108 s) with well-defined directions. The neutron diffraction measurements show that below 0.2 K there is no long-range magnetic order. PACS Nos.: 75.40-s, 76.80+y, 75.50Dd
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.003 | 0.003 |
| Meta-epidemiology (broad) | 0.003 | 0.002 |
| Bibliometrics | 0.001 | 0.004 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.004 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.001 | 0.004 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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; both teacher heads agree on what is shown here.
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".