Study of Hyperfine and Fine Interactions of Nd<sup>3+</sup> and Ce<sup>3+</sup> Ions in LaNbO<sub>4</sub> and PrNbO<sub>4</sub> Crystals by X-Band EPR at Liquid-Helium Temperatures
Bibliographic record
Abstract
EPR studies on diamagnetic LaNbO 4 and paramagnetic PrNbO 4 crystals doped with the Kramers ions Nd 3+ and Ce 3+ were carried out at X-band (9.61 GHz) in the 4−30 K temperature range. The principal values of Nd 3+ and Ce 3+ g̃ 2 and à 2 tensors, and the orientations of their principal axes, were determined accurately from angular variations of EPR line positions recorded for rotation of the external magnetic field in three mutually perpendicular planes in the two crystals at 8 K. The larger EPR line widths of these ions in the paramagnetic PrNbO 4 host crystal as compared to those in diamagnetic LaNbO 4 are ascribed to their interaction with the host Pr 3+ ions and presence of defects.
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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".