Facile synthesis of superconducting NbN nanoparticles

Xianguo Liu, Guiping Zhou, Siu Wing Or, Songlin Ran, Yuping Sun

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Face-centered cubic NbN (δ-NbN) nanoparticles have been synthesized by arc-discharging Nb ingot in a mixture of H2, Ar and N2. The presence of δ-NbN is attributed to the high surface energy of nanoparticles and the nonequilibrium condition during the arc-discharging process. NbN nanoparticles are of irregular spherical shape, and the diameter distribution is from 5 to 15 nm. The critical temperature of superconducting transition in NbN nanoparticles is determined to be 15.1 K, which is slightly less than that for the bulk counterpart. The difference is attributed to the fact that the size of NbN nanoparticles is comparable with the coherence length of NbN.
Original languageEnglish
Pages (from-to)849-852
Number of pages4
JournalCeramics International
Volume41
Issue number1
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Magnetic
  • Nanoparticles
  • NbN
  • Superconducting

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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