Absence of long-range order in the frustrated magnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>SrDy</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math> due to trapped defects from a dimensionality crossover
Why this work is in the frame
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Bibliographic record
Abstract
Magnetic frustration and low dimensionality can prevent long-range magnetic order and lead to exotic correlated ground states. ${\mathrm{SrDy}}_{2}{\mathrm{O}}_{4}$ consists of magnetic ${\mathrm{Dy}}^{3+}$ ions forming magnetically frustrated zigzag chains along the $c$ axis and shows no long-range order to temperatures as low as $T=60$ mK. We carried out neutron scattering and ac magnetic susceptibility measurements using powder and single crystals of ${\mathrm{SrDy}}_{2}{\mathrm{O}}_{4}$. Diffuse neutron scattering indicates strong one-dimensional (1D) magnetic correlations along the chain direction that can be qualitatively accounted for by the axial next-nearest-neighbor Ising model with nearest-neighbor and next-nearest-neighbor exchange ${J}_{1}=0.3$ meV and ${J}_{2}=0.2$ meV, respectively. Three-dimensional (3D) correlations become important below ${T}^{*}\ensuremath{\approx}0.7$ K. At $T=60$ mK, the short-range correlations are characterized by a putative propagation vector ${\mathbf{k}}_{1/2}=(0,\frac{1}{2},\frac{1}{2})$. We argue that the absence of long-range order arises from the presence of slowly decaying 1D domain walls that are trapped due to 3D correlations. This stabilizes a low-temperature phase without long-range magnetic order, but with well-ordered chain segments separated by slowly moving domain walls.
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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 | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.001 | 0.003 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.004 | 0.003 |
| Research integrity | 0.001 | 0.003 |
| Insufficient payload (model declined to judge) | 0.183 | 0.005 |
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