Optical floating zone method growth and photoluminescence property of MgNb₂O₆ crystal

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• 作者：Liang Li^a ; Guanlin Feng^a ; Dejun Wang^b ; Hang Yang^c ; Zhongmin Gao^d ; Benxian Li^d ; Dapeng Xu^a ; ^c ; ^{xudp@jlu.edu.cn"" rel=""nofollow} ; Zhanhui Ding^c ; Xiaoyang Liu^d
• 关键词：MgNb₂O₆ ; Crystal growth ; X-ray diffraction ; Luminescence
• 刊名：Journal of Alloys and Compounds
• 出版年：2011
• 出版时间：7 July 2011
• 年：2011
• 卷：509
• 期：27
• 页码：L263-L266
• 全文大小：425 K

文摘

MgNb₂O₆ single crystals are grown by the optical floating zone method. The as-grown crystals are dark brown and have dimensions of Ø 4–6 mm × L 87 mm, with the largest crystal domain being Ø 5 mm × L 32 mm. After being annealed, the crystals fade to light brown. The powder X-ray diffraction analysis shows that the crystals have a columbite-type MgNb₂O₆ structure. The crystal grows along the c-axis and the cleavage plane is the (0 1 0) plane. Transmission polarized light microscopy measurements show that the crystal is free of low-angle grain boundaries and inclusions. The crystals have been characterized by Raman scattering, which reveals the change of Nb–O band in annealed and non-annealed samples. The photoluminescence spectra exhibit a broad and strong blue emission band centered at 435 nm.