Crystal structure and physical properties of Mg6Cu16Si7-type M6Ni16Si7, for M = Mg, Sc, Ti, Nb, and Ta

K. L. Holman, E. Morosan, P. A. Casey, Lu Li, N. P. Ong, T. Klimczuk, C. Felser, R. J. Cava

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Five compounds were investigated for magnetic character and superconductivity, all with non-magnetic nickel and band structures containing flat bands and steep bands. The syntheses and crystal structures, refined by powder X-ray diffraction, are reported for M6Ni16Si7, where M = Mg, Sc, Ti, Nb, and Ta. All compounds form in the Mg6Cu16Si7 structure type. Resistance measurements are also reported on M6Ni16Si7 (M = Mg, Sc, Ti, and Nb) down to 0.3 K, with all four showing metallic conductivity. No superconductivity is observed. Magnetization measurements for all compounds reveal essentially temperature independent paramagnetism, with a tendency toward more enhanced low temperature paramagnetism for the cases of Mg6Ni16Si7 and Sc6Ni16Si7.

Original languageEnglish (US)
Pages (from-to)9-15
Number of pages7
JournalMaterials Research Bulletin
Issue number1
StatePublished - Jan 8 2008

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


  • A. Intermetallic compounds
  • A. Metals
  • B. Chemical synthesis
  • C. X-ray diffraction
  • D. Superconductivity


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