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

doi:10.1016/j.materresbull.2009.04.008

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

Materials Development Division

Research output: Contribution to journal › Article

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 language	English
Pages (from-to)	1656-1659
Number of pages	4
Journal	Materials Research Bulletin
Volume	44
Issue number	8
DOIs	https://doi.org/10.1016/j.materresbull.2009.04.008
Publication status	Published - 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

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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, M{\"o}ssbauer 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.",

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

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AU - Yamamoto, Shinichi

AU - Kikkawa, Shinichi

AU - Masubuchi, Yuji

AU - Takeda, Takashi

AU - Okube, Maki

AU - Yoshiasa, Akira

AU - Lumey, Marck

AU - Dronskowski, Richard

PY - 2009/8/5

Y1 - 2009/8/5

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AB - 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.

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KW - A. Nitrides

KW - B. Chemical synthesis

KW - D. Crystal structure

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