13C 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

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 T_c =7.0K that grows with decreasing magnetic field.

Original language	English (US)
Pages (from-to)	257601-1-257601-4
Journal	Physical review letters
Volume	87
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.87.257601
State	Published - Dec 17 2001

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Physics and Astronomy(all)

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10.1103/PhysRevLett.87.257601

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AU - Hayward, M. A.

AU - Cava, R. J.

PY - 2001/12/17

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AB - 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.

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

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