Phase diagram of the relaxor ferroelectric<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mn/><mml:mi>−</mml:mi><mml:mi>x</mml:mi><mml:mo>)</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">P</mml:mi><mml:mi mathvariant="normal">b</mml:mi><mml:mo>(</mml:mo><mml:mi mathvariant="normal">Z</mml:mi><mml:mi mathvariant="normal">n</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Nb</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>/</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mo>)</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mo>−</mml:mo><mml:mi>x</mml:mi><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">PbTiO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Why this work is in the frame
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Bibliographic record
Abstract
Recently, a new orthorhombic phase has been discovered in the ferroelectric system $(1\ensuremath{-}x)\mathrm{Pb}({\mathrm{Zn}}_{1/3}{\mathrm{Nb}}_{2/3}){\mathrm{O}}_{3}\ensuremath{-}x{\mathrm{PbTiO}}_{3}$ $(\mathrm{PZN}\ensuremath{-}x\mathrm{PT})$ for $x=9%,$ and for $x=8%$ after the application of an electric field. In the present work, synchrotron x-ray measurements have been extended to higher concentrations $10%<~x<~15%.$ The orthorhombic phase was observed for $x=10%,$ but, surprisingly, for $x>~11%$ only a tetragonal phase was found down to 20 K. The orthorhombic phase thus exists only in a narrow concentration range with near-vertical phase boundaries on both sides. This orthorhombic symmetry ${(M}_{C}$ type) is in contrast to the monoclinic ${M}_{A}$-type symmetry recently identified at low temperatures in the $\mathrm{Pb}({\mathrm{Zr}}_{1\ensuremath{-}x}{\mathrm{Ti}}_{x}){\mathrm{O}}_{3}$ (PZT) system over a triangle-shaped region of the phase diagram in the range $x=0.46--0.52.$ To further characterize this relaxor-type system, neutron inelastic scattering measurements have also been performed on a crystal of $\mathrm{PZN}\ensuremath{-}x\mathrm{PT}$ with $x=15%.$ The anomalous soft-phonon behavior (``waterfall'' effect) previously observed for $x=0%$ and 8% is clearly observed for the 15% crystal, which indicates that the presence of polar nanoregions extends to large values of x.
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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 | 0.016 | 0.014 |
| Meta-epidemiology (narrow) | 0.007 | 0.016 |
| Meta-epidemiology (broad) | 0.003 | 0.015 |
| Bibliometrics | 0.006 | 0.012 |
| Science and technology studies | 0.012 | 0.014 |
| Scholarly communication | 0.014 | 0.012 |
| Open science | 0.020 | 0.016 |
| Research integrity | 0.018 | 0.014 |
| Insufficient payload (model declined to judge) | 0.974 | 0.018 |
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