TY - JOUR
T1 - Preparation of gallium oxynitride in the presence of iron through a citrate route
AU - Yamamoto, Shinichi
AU - Kikkawa, Shinichi
AU - Masubuchi, Yuji
AU - Takeda, Takashi
AU - Okube, Maki
AU - Yoshiasa, Akira
AU - Lumey, Marck
AU - Dronskowski, Richard
N1 - Funding Information:
This research was partly supported from the Grant-in-Aid for Scientific Research (B) of JSPS (Grant No. 19350098). This work was performed under the approval of the Photon Factory Advisory Committee (Proposal No. 2006G081). RD and ML wish to thank the computing centre at RWTH Aachen for providing large amounts of CPU time.
PY - 2009/8/5
Y1 - 2009/8/5
N2 - 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.
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.
KW - A. Inorganic compounds
KW - A. Nitrides
KW - B. Chemical synthesis
KW - D. Crystal structure
KW - D. Electronic structure
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U2 - 10.1016/j.materresbull.2009.04.008
DO - 10.1016/j.materresbull.2009.04.008
M3 - Article
AN - SCOPUS:67349208162
VL - 44
SP - 1656
EP - 1659
JO - Materials Research Bulletin
JF - Materials Research Bulletin
SN - 0025-5408
IS - 8
ER -