Microstructural features of MgxCyNi3 superconducting materials
J. Q. Li, L. J. Wu, L. Li, Y. Zhu
DOI 10.1103/PhysRevB.65.052506 · Physical Review B
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Abstract
Structural investigations on a series of superconducting materials with nominal compositions of MgxCyNi3 (1.0<x<1.3,1.0<y<1.55) have revealed evident structural inhomogeneity. Regular domains, with an average size as small as ∼4 nm, appear commonly in the superconducting materials with Tc>6K. This structural phenomenon can be qualitatively explained in terms of the perovskite cubic structure MgCNi3 modulated locally by the variable stoichiometry on the C sites. The presence of the local C deficiency could be a dominant factor affecting the crystal structure and superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Mg1.2C1.4Ni3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7 | Pressure not reported | unknown |
| Mg1.2C1.4Ni3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7 | Pressure not reported | unknown |
| Mg1.1C1.2Ni3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Mg1.1C1.2Ni3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39 | Pressure not reported | unknown |
| MgCNi3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | unknown |
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