Estimates of the critical exponents of single-crystal<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>La</mml:mi><mml:mn>0.73</mml:mn></mml:msub><mml:msub><mml:mi>Ba</mml:mi><mml:mn>0.27</mml:mn></mml:msub><mml:msub><mml:mi>MnO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>
Bibliographic record
Abstract
The analysis of detailed magnetization measurements, supplemented by zero-field ac susceptibility data, on single-crystal ${\mathrm{La}}_{0.73}{\mathrm{Ba}}_{0.27}{\mathrm{MnO}}_{3}$ indicates the occurrence of a continuous ferromagnetic-to-paramagnetic phase transition at 245 K. This transition is characterized by exponent values $\ensuremath{\gamma}=1.39(2)\ifmmode\pm\else\textpm\fi{}0.005,\ensuremath{\beta}=0.364\ifmmode\pm\else\textpm\fi{}0.003$, and $\ensuremath{\delta}=4.83\ifmmode\pm\else\textpm\fi{}0.04$, and these, along with estimates for the critical amplitudes, suggest that this transition falls into the universality class of the near-neighbor, three-dimensional Heisenberg model. Such a result has been predicted by simulations for double-exchange coupled systems in which anisotropy does not play a major role. Low temperature magnetization data indicate that any effects due to spin canting are minimal.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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; 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".