Nature of Weak Magnetism in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>SrTiO</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mo>/</mml:mo><mml:msub><mml:mi>LaAlO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>Multilayers
Why this work is in the frame
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Bibliographic record
Abstract
We report the observation of weak magnetism in superlattices of ${\mathrm{LaAlO}}_{3}/{\mathrm{SrTiO}}_{3}$ using $\ensuremath{\beta}$-detected nuclear magnetic resonance. The spin lattice relaxation rate of $^{8}\mathrm{Li}$ in superlattices with a spacer layers of 8 and 6 unit cells of ${\mathrm{LaAlO}}_{3}$ exhibits a strong peak near $\ensuremath{\sim}35\text{ }\text{ }\mathrm{K}$, whereas no such peak is observed in a superlattice with spacer layer thickness of 3 unit cells. We attribute the observed temperature dependence to slowing down of weakly coupled electronic moments at the ${\mathrm{LaAlO}}_{3}/{\mathrm{SrTiO}}_{3}$ interface. These results show that the magnetism at the interface depends strongly on the thickness of the spacer layer, and that a minimal thickness of $\ensuremath{\sim}4--6$ unit cells is required for the appearance of magnetism. A simple model is used to determine that the observed relaxation is due to small fluctuating moments ($\ensuremath{\sim}0.002{\ensuremath{\mu}}_{B}$) in the two samples with a larger ${\mathrm{LaAlO}}_{3}$ spacer thickness.
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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 | 0.003 | 0.003 |
| Meta-epidemiology (narrow) | 0.002 | 0.003 |
| Meta-epidemiology (broad) | 0.001 | 0.003 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.002 | 0.003 |
| Scholarly communication | 0.001 | 0.003 |
| Open science | 0.004 | 0.003 |
| Research integrity | 0.002 | 0.004 |
| Insufficient payload (model declined to judge) | 0.057 | 0.004 |
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