Carbon isotope effect in superconducting MgCNi3

T. Klimczuk, R. J. Cava

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42 Scopus citations


The effect of carbon isotope substitution on TC in the intermetallic perovskite superconductor MgCNi3 is reported. Four independent groups of samples were synthesized and characterized. The average TC for the 12C samples was found to be 7.12±0.02 K and the average TC for the 13C samples was found to be 6.82±0.02 K. The resulting carbon isotope effect coefficient is αC=0.540±0.03. This indicates that carbon-based phonons play a critical role in the presence of superconductivity in this compound.

Original languageEnglish (US)
Article number212514
Pages (from-to)1-3
Number of pages3
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number21
StatePublished - Dec 2004

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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