Magnetic-ordering process in SrCr<sub>9</sub>(Ga-In)<sub>3</sub>O<sub>19</sub>
Bibliographic record
Abstract
To investigate the anomalous magnetic properties of SrCr9xGa3+xO19, we synthesized SrCr9x(Ga0.95In0.05)3+xO19 compounds including the x = 0 compounds and carried out magnetic and µSR measurements. The results show clearly the insignificant role of the defects in the magnetic Cr lattice. Based on the results, a classical Heisenberg spin model, the plaquette-ordering model, is presented. Below 60 K, seven moments on a bi-tetrahedron plaquette correlate anti-ferromagnetically to give one moment, so that the Curie constant decreases to 1/9 at low temperatures. The surviving moments forming a triangular lattice do not exhibit long-range order due to frustration but the c-components of the moments are frozen randomly below Tf. The muoniums formed in the compound combine with the oxygen ions connecting Cr3+ ions and are subject to transferred hyperfine fields from Cr moments. This field is shielded by the electrons of the muonium so as to be hardly decoupled by external fields. PACS Nos.: 75.40Cx, 75.50Ee
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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".