X-ray-absorption spectroscopy study of the heavy-fermion superconductor PrOs4Sb12
D. Cao, F. Bridges, S. Bushart, E. D. Bauer, M. B. Maple
DOI 10.1103/PhysRevB.67.180511 · Physical Review B
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Abstract
X-ray-absorption fine-structure (XAFS) measurements have been carried out at the Pr LIII and Os LIII edges on the Pr-based heavy-fermion superconductor PrOs4Sb12. The x-ray absorption near-edge structure results suggest that the Pr valence is very close to 3+ with at most a small amount of Pr4+ [vPr∼3.019(3)], while Os is close to metallic in this material. The extended XAFS results show that the Pr ions rattle inside the Sb cage characterized by a low Einstein temperature (ΘE∼75K), with a possible very small off-center displacement. They also indicate that the Os4Sb12 framework in PrOs4Sb12 is quite stiff.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| PrOs4Sb12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.85 | Pressure not reported | unknown |
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