Crystal structure of Eu-doped magnetoplumbite-type lanthanum aluminum oxynitride with emission site splitting

Masubuchi, Yuji; Hata, Tomoyuki; Motohashi, Teruki et al.

Journal of Solid State Chemistry, 2011, 184(9), 2533-2537

Permalink : https://hdl.handle.net/2115/47214

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アクセス権
open access
URI
https://hdl.handle.net/2115/47214
タイトル
Crystal structure of Eu-doped magnetoplumbite-type lanthanum aluminum oxynitride with emission site splitting
著者
Masubuchi, Yuji ; Hata, Tomoyuki ; Motohashi, Teruki ; Kikkawa, Shinichi
e-Rad_Researcher
80466440
著者名
Masubuchi, Yuji
著者名
Hata, Tomoyuki
著者名
Motohashi, Teruki
著者名
Kikkawa, Shinichi
言語
英語
キーワード
Lanthanum aluminum oxynitride
Magnetoplumbite structure
Photoluminescence
Neutron diffraction
発行日
2011-09
出版者
Elsevier
収録物名
Journal of Solid State Chemistry
巻(号)
184(9)
ページ
2533-2537
抄録
Eu-doped lanthanum aluminum oxynitride (LaAl12(O,N)19) with magnetoplumbite structure was prepared by nitridation of the oxide precursor obtained from aluminum glycine gel and subsequent post-annealing. Eu-doped lanthanum aluminum oxynitride exhibited blue light emission at 440 nm with a shoulder at 464 nm under excitation at 254 nm. Isostructural Eu-doped calcium aluminum oxide (CaAl12O19) exhibited a single emission peak at 415 nm. Structural refinement using neutron powder diffraction indicated that the lanthanum site occupied partially by Eu^[2+] splits into 2d and 6h sites in the aluminum oxynitride. The longer emission and the shoulder peak in the former aluminum oxynitride were observed in relation to the increasing covalency as well as crystal field splitting around doped Eu^[2+] induced by site splitting involved with the two kinds of anions.
資源タイプ
学術雑誌論文
出版タイプ
Accepted Manuscript
PISSN
0022-4596
関連情報 (isVersionOf)
出版社版DOI
https://doi.org/10.1016/j.jssc.2011.07.035