Extended x-ray-absorption fine-structure observation of collinear ordering of Fe-Sn-Fe atoms in the Chevrel-phase superconductor SnFe0.05Mo6S8
P. P. Vaishnava, C. W. Kimball, J. L. Matykiewicz, F. Y. Fradin, G. K. Shenoy, P. A. Montano
DOI 10.1103/PhysRevB.34.4599 · Physical Review B
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Abstract
Extended x-ray-absorption fine-structure (EXAFS) and x-ray-diffraction studies have been conducted on the Chevrel-phase superconductor SnFe0.05Mo6S8. The site symmetry of the iron is found to be similar to that of copper in the high-temperature phase of Cu1.8Mo6S8. EXAFS analysis yielded interatomic distances, e.g., Fe-Sn and Fe-S, in this compound. The Fe-S distances are found to be characteristic of iron sulfides (e.g., FeS and Fe7S8). Through the observation of focused multiple scattering, a distance corresponding to a linear array of Fe-Sn-Fe atoms was measured. Iron atoms were found to be situated in two different configurations, one where iron has only a tin neighbor and the other where a linear-chain-like configuration of Fe-Sn-Fe atoms occurs.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SnFe0.05Mo6S8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.02 | Pressure not reported | unknown |
| SnMo6S8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14.3 | Pressure not reported | unknown |
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