Superconductivity in quaternary niobium oxynitrides containing main group elements (M=Mg, Al, Si)

Y. Ohashi, S. Kikkawa*, I. Felner, M. I. Tsindlekht, D. Venkateshwarlu, V. Ganesan, J. V. Yakhmi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Niobium compounds continue to be an interesting family of superconductors, with the recent addition of oxynitrides to it, which can be categorized as low-T c superconductors (LTS) because they exhibit superconductivity below T c∼17 K. In this paper, we report the superconducting properties of three members of the family of niobium oxynitrides, viz. (Nb 0.89Al 0.11)(N 0.84O 0.16), (Nb 0.95Mg 0.05)(N 0.92O 0.08) and (Nb 0.87Si 0.090.04)(N 0.87O 0.13). Low temperature dc and ac magnetization measurements have been performed. In addition, heat capacity has been recorded at low temperature under applied magnetic fields. A detailed analysis of the data is presented.

Original languageEnglish
Pages (from-to)66-71
Number of pages6
JournalJournal of Solid State Chemistry
Volume188
DOIs
StatePublished - Apr 2012

Keywords

  • Heat capacity
  • Magnetic measurement
  • Niobium oxynitride
  • Superconductor

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