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, Nai Phuan Ong, T. Klimczuk, C. Felser, Robert Joseph Cava

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

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
Volume43
Issue number1
DOIs
StatePublished - Jan 8 2008

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Keywords

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

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