Preparation of gallium oxynitride in the presence of iron through a citrate route

Shinichi Yamamoto, Shinichi Kikkawa, Yuji Masubuchi, Takashi Takeda, Maki Okube, Akira Yoshiasa, Marck Lumey, Richard Dronskowski

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11 Citations (Scopus)

Abstract

Gallium oxynitrides were prepared in the copresence of various amounts of Fe3+ by ammonia nitridation of oxide precursors. Their crystallinity reduced in a compositional range up to 3 mol% and improved again above 4 mol% with an appearance of a nitride impurity. The product with 2 mol% of Fe3+ showed the maximum oxygen content of 21 mol% and minimum nitrogen content of 24 mol%. X-ray absorption spectroscopy, Mössbauer and magnetic measurements suggested a small amount of Fe3O4-like clusters in the oxynitride products. Density-functional calculations supported that the Fe-O-clustered system is more preferable than the statistical distribution of iron in the hexagonal gallium oxynitride structure.

Original languageEnglish
Pages (from-to)1656-1659
Number of pages4
JournalMaterials Research Bulletin
Volume44
Issue number8
DOIs
Publication statusPublished - 2009 Aug 5

Keywords

  • A. Inorganic compounds
  • A. Nitrides
  • B. Chemical synthesis
  • D. Crystal structure
  • D. Electronic structure

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Yamamoto, S., Kikkawa, S., Masubuchi, Y., Takeda, T., Okube, M., Yoshiasa, A., Lumey, M., & Dronskowski, R. (2009). Preparation of gallium oxynitride in the presence of iron through a citrate route. Materials Research Bulletin, 44(8), 1656-1659. https://doi.org/10.1016/j.materresbull.2009.04.008