Neutron powder diffraction study of the 12 K superconductor La3Ni2B2N3-x

Q. Huang, B. C. Chakoumakos, A. Santoro, R. J. Cava, J. J. Krajewski, W. F. Peck

Research output: Contribution to journalArticle

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Abstract

The structure of superconducting La3Ni2B2N3-x has been investigated by neutron powder diffraction methods at room temperature. The compound crystallizes with the symmetry of space group I4/mmm (No. 139) and lattice parameters a = 3.72512(5) and c = 20.5172(4) A ̊. The structure is layered and is made of (LaN) (LaN) (LaN) blocks with the rock-salt configuration alternating along the c-axis with Ni2B2 blocks having a fluorite-type arrangement of the atoms. The nitrogen site located on the central layer of the rock-salt block is only 90% occupied, yielding stoichiometry La3Ni2B2N2.9. Layers are connected to each other along the c-axis by LaN, BN and NiB bonds, while the connections within the layers are provided by LaN and NiNi bonds.

Original languageEnglish (US)
Pages (from-to)101-105
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume244
Issue number1-2
DOIs
StatePublished - Mar 10 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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