13C NMR Investigation of the superconductor MgCNi3 up to 800 K

P. M. Singer, T. Imai, T. He, M. A. Hayward, R. J. Cava

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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.

Original languageEnglish (US)
Pages (from-to)257601-1-257601-4
JournalPhysical review letters
Volume87
Issue number25
DOIs
StatePublished - Dec 17 2001

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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