Synthesis, Structure, and Magnetic Properties of the New Ternary Nitride BaHfN2and of the BaHf1-xZrxN2Solid Solution

D. H. Gregory, M. G. Barker, P. P. Edwards, M. Slaski, D. J. Siddons

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25 Citations (Scopus)

Abstract

The new ternary nitrides BaHf1-xZrxN2(0≤x≤1) have been synthesized by the solid state reaction of the binary nitrides Ba3N2, HfN, and ZrN and characterized by powder X-ray diffraction. The crystal structure of the end member, BaHfN2, has been refined from powder data. The nitridohafnate crystallizes in the tetragonal space groupP4/nmm(a=4.1279(1) Å,c=8.3816(4) Å,Z=2) and is isostructural with the oxide KCoO2. Hafnium is coordinated to five nitrogens in a distorted square base pyramidal geometry, forming layers of edge-sharing pyramids which stack along thecaxis. Barium is situated between the Hf-N layers and is coordinated to five nitrogen atoms. Samples exhibit temperature-dependent paramagnetism between approximately 8 and 293 K and become superconducting below 8 K.

Original languageEnglish
Pages (from-to)62-70
Number of pages9
JournalJournal of Solid State Chemistry
Volume137
Issue number1
DOIs
Publication statusPublished - Apr 1 1998
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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