Correlation between phase competition and the nucleation of a Griffiths-like phase in (La<sub>1-y</sub>Pr<sub>y</sub>)<sub>0.7</sub>Ca<sub>0.3</sub>Mn<sup>16/18</sup>O<sub>3</sub>
Bibliographic record
Abstract
Detailed analyses of the temperature-dependent zero-field ac susceptibility of prototypical phase-separated (La 1- y Pr y ) 0.7 Ca 0.3 Mn 16/18 O 3 , 0⩽ y ⩽1, reveal features consistent with the presence of a Griffiths-like phase (GP), viz , an inverse susceptibility (χ -1 ) characterized by χ -1 ∝( T -T C Rand ) 1-λ with 0.05⩽λ⩽0.33 as y decreases towards y c ⩽0.85. Beyond y c =0.85, the GP is suppressed. These data, combined with previous neutron diffraction measurements, enable a phase diagram summarizing the evolution of the GP with composition to be constructed for this system; this phase diagram demonstrates the novel result that the disorder relevant for the establishment of such a phase in this system is linked closely to the relative volume fractions of the phase-separated antiferromagnetic and ferromagnetic components, even when the recently estimated double-exchange–linked percolation threshold is exceeded. The influence of electron-phonon coupling can also be seen through oxygen isotope effects.
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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 | 0.001 |
| 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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".