Nickel-based layered superconductor, LaNiOAs

Takumi Watanabe, Hiroshi Yanagi, Yoichi Kamihara, Toshio Kamiya, Masahiro Hirano, Hideo Hosono

Research output: Contribution to journalArticlepeer-review

95 Citations (Scopus)


Rietveld analysis of the powder X-ray diffraction of a new layered oxyarsenide, LaNiOAs, which was synthesized by solid-state reactions, revealed that LaNiOAs belongs to the tetragonal ZrCuSiAs-type structure (P4/nmm) and is composed of alternating stacks of La-O and Ni-As layers. The electrical and magnetic measurements demonstrated that LaNiOAs exhibits a superconducting transition at 2.4 K, and above this, LaNiOAs shows metallic conduction and Pauli paramagnetism. The diamagnetic susceptibility measured at 1.8 K corresponded to ∼20% of perfect diamagnetic susceptibility, substantiating that LaNiOAs is a bulk superconductor.

Original languageEnglish
Pages (from-to)2117-2120
Number of pages4
JournalJournal of Solid State Chemistry
Issue number8
Publication statusPublished - 2008 Aug
Externally publishedYes


  • LaNiOAs
  • Layered compound
  • Superconductor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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