Field-Dependent Diamagnetic Transition in Magnetic Superconductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow><mml:mi mathvariant="normal">S</mml:mi><mml:mi mathvariant="normal">m</mml:mi></mml:mrow><mml:mn>1.85</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">e</mml:mi></mml:mrow><mml:mn>0.15</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">u</mml:mi><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn><mml:mo>−</mml:mo><mml:mi>y</mml:mi></mml:mrow></mml:msub></mml:math>
Bibliographic record
Abstract
The magnetic penetration depth of single crystal ${\mathrm{S}\mathrm{m}}_{1.85}{\mathrm{C}\mathrm{e}}_{0.15}{\mathrm{C}\mathrm{u}\mathrm{O}}_{4\ensuremath{-}y}$ was measured down to 0.4 K in dc fields up to 7 kOe. For insulating ${\mathrm{S}\mathrm{m}}_{2}{\mathrm{C}\mathrm{u}\mathrm{O}}_{4}$, ${\mathrm{S}\mathrm{m}}^{3+}$ spins order at the N\'eel temperature, ${T}_{N}=6\text{ }\text{ }\mathrm{K}$, independent of the applied field. Superconducting ${\mathrm{S}\mathrm{m}}_{1.85}{\mathrm{C}\mathrm{e}}_{0.15}{\mathrm{C}\mathrm{u}\mathrm{O}}_{4\ensuremath{-}y}$ (${T}_{c}\ensuremath{\approx}23\text{ }\text{ }\mathrm{K}$) shows a sharp increase in diamagnetic screening below ${T}^{*}(H)$ which varied from 4.0 K ($H=0$) to 0.5 K ($H=7\text{ }\text{ }\mathrm{k}\mathrm{O}\mathrm{e}$) for a field along the $c$ axis. If the field was aligned parallel to the conducting planes, ${T}^{*}$ remained unchanged. The unusual field dependence of ${T}^{*}$ indicates a spin-freezing transition that dramatically increases the superfluid density.
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How this classification was reachedexpand
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 | 0.008 | 0.004 |
| Meta-epidemiology (narrow) | 0.004 | 0.009 |
| Meta-epidemiology (broad) | 0.002 | 0.009 |
| Bibliometrics | 0.003 | 0.006 |
| Science and technology studies | 0.007 | 0.007 |
| Scholarly communication | 0.007 | 0.010 |
| Open science | 0.010 | 0.008 |
| Research integrity | 0.008 | 0.009 |
| Insufficient payload (model declined to judge) | 0.925 | 0.010 |
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; both teacher heads agree on what is shown here.
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".