Fractional magnetization plateaus in the Shastry–Sutherland lattice material Er<sub>2</sub>Be<sub>2</sub>GeO<sub>7</sub>
Bibliographic record
Abstract
Abstract The experimental study of magnetism on the Shastry–Sutherland lattice (SSL) has been ongoing for more than two decades, following the discovery of the first SSL material SrCu2(BO3)2. However, investigation of SSL systems is often complicated by the requirements of high magnetic fields (e.g. > 20 T for SrCu2(BO3)2) or the presence of itinerant electrons (e.g. REB4). In this paper, we present the magnetic properties of the SSL material Er2Be2GeO7. Like SrCu2(BO3)2, Er2Be2GeO7 exhibits fractional magnetization plateaus. However, unlike SrCu2(BO3)2, Er2Be2GeO7 exhibits long-range order below ∼ 1 K, and the plateaus are accessible using commercial laboratory equipment, occurring for fields < 1 T. The fractions of magnetization present are closest to 1 / 4 , 4 / 9 , and 1 / 2 of the saturation magnetization. Hysteresis is observed in the 4 / 9 and 1 / 2 plateau phases. The lack of itinerant electrons, chemical disorder, and the low fields required to access the fractional magnetization plateaus promise Er2Be2GeO7 as a prime candidate for the study of frustrated magnetism on the SSL.
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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) | 0.003 | 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
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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".