C13 NMR Investigation of the Superconductor MgCNi3 up to 800 K
P. M. Singer, T. Imai, T. He, M. A. Hayward, R. J. Cava
DOI 10.1103/PhysRevLett.87.257601 · Physical Review Letters
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Abstract
We report 13C NMR characterization of the new superconductor MgCNi3 [T. He et al., Nature (London) 411, 54 (2001)]. We found that both the uniform spin susceptibility and the spin fluctuations show a strong enhancement with decreasing temperature, and saturate below ∼50K and ∼20K, respectively. The nuclear spin-lattice relaxation rate 1/13T1 exhibits typical behavior for isotropic s-wave superconductivity with a coherence peak below Tc=7.0K that grows with decreasing magnetic field.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgCNi3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7 | Pressure not reported | onset |
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