Raman and crystal field studies of Tb-O bonds in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>TbM</mml:mi><mml:msub><mml:mi mathvariant="normal">n</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>
Why this work is in the frame
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Bibliographic record
Abstract
We have studied the temperature dependence of $\mathrm{TbM}{\mathrm{n}}_{2}{\mathrm{O}}_{5}$ Raman-active phonons and its $\mathrm{T}{\mathrm{b}}^{3+}$ crystal field (CF) excitations. Interestingly, the Raman intensities of some phonons are significantly reduced below $\ensuremath{\sim}180\phantom{\rule{0.16em}{0ex}}\mathrm{K}$. Such behaviors are also observed in $\mathrm{HoM}{\mathrm{n}}_{2}{\mathrm{O}}_{5}$ and $\mathrm{YM}{\mathrm{n}}_{2}{\mathrm{O}}_{5}$ systems. A connection between the Raman intensities and the nearest-neighbor mean-square relative displacement ${\ensuremath{\sigma}}^{2}$ is established. Also, some of the $\mathrm{T}{\mathrm{b}}^{3+}$ and $\mathrm{H}{\mathrm{o}}^{3+}$ CF excitations become broader below $\ensuremath{\sim}180\phantom{\rule{0.16em}{0ex}}\mathrm{K}$. These results are discussed in terms of the disorder induced by the Tb-O bond splitting.
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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 | 0.005 | 0.005 |
| Meta-epidemiology (narrow) | 0.002 | 0.003 |
| Meta-epidemiology (broad) | 0.001 | 0.003 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.002 | 0.003 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.004 | 0.004 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.369 | 0.004 |
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 it