Anisotropic Transport and Magnetic Properties of Ternary Uranium Antimonides U<sub>3</sub>ScSb<sub>5</sub> and U<sub>3</sub>TiSb<sub>5</sub>
Bibliographic record
Abstract
Single needle-shaped crystals of U 3 ScSb 5 and U 3 TiSb 5 were grown in a tin flux. The structure of the new compound U 3 ScSb 5 was determined from single-crystal X-ray diffraction data (Pearson symbol hP 18, hexagonal, space group P 6 3 / mcm, Z = 2, a = 9.2145(2) Å, c = 6.1938(2) Å). The angular dependence of the magnetization has been studied. Ferromagnetic ordering develops within the ab plane at T C = 130 K for U 3 ScSb 5 and 160 K for U 3 TiSb 5, but there are essentially no magnetic interactions parallel to the c axis, confirming the high anisotropy expected from the crystal structure. In both cases, the easy axis for magnetization is the [120] direction. A sharp decrease below the ordering temperature is observed in the electrical resistivity parallel to the c axis; in contrast, the temperature dependence is much weaker within the ab plane. For U 3 TiSb 5, a second transition occurs at 25 K, possibly arising from a spin reorientation process. The thermoelectric power measured along the c axis for both compounds is positive and small at high temperatures, following approximately a linear dependence with temperature indicative of metallic behavior in this region. The thermopower exhibits a kink at the ferromagnetic transition temperature in the case of U 3 TiSb 5, but it is not so clear in the case of U 3 ScSb 5 . A change in sign of the thermopower occurs below T C for both compounds, characteristic of multiband conducting systems.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".