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Crystal structure of Eu-doped magnetoplumbite-type lanthanum aluminum oxynitride with emission site splitting
Title: | Crystal structure of Eu-doped magnetoplumbite-type lanthanum aluminum oxynitride with emission site splitting |
Authors: | Masubuchi, Yuji Browse this author →KAKEN DB | Hata, Tomoyuki Browse this author | Motohashi, Teruki Browse this author | Kikkawa, Shinichi Browse this author |
Keywords: | Lanthanum aluminum oxynitride | Magnetoplumbite structure | Photoluminescence | Neutron diffraction |
Issue Date: | Sep-2011 |
Publisher: | Elsevier |
Journal Title: | Journal of Solid State Chemistry |
Volume: | 184 |
Issue: | 9 |
Start Page: | 2533 |
End Page: | 2537 |
Publisher DOI: | 10.1016/j.jssc.2011.07.035 |
Abstract: | 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. |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/47214 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 鱒渕 友治
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