掺铈铌酸锂晶体的生长和表征.pdf

:溶液法制备p型ZnO的研究进展· 412 ·第40卷第3期掺铈铌酸锂晶体的生长和表征张娜娜,王继扬,颜涛,韩淑娟,郭永解(山东大学,晶体材料国家重点实验室,济南 250100) 摘要:采用提拉法生长了掺Ce的同成分LiNbO(Ce:CLN)晶体。X射线粉末衍射表明,掺杂并不影响晶体结构,其空间群为R3c。采用X射线荧光光谱分析方法,。室温下,晶体在700~3500nm波段的透过率达75%。利用X射线光电子谱(X-ray photoelectron spectroscopy,XPS)和Raman光谱分别表征了铈离子对铌酸锂的电子和声子结构的影响。XPS结果表明,铌离子仅存在纯的+5价,铈离子由于浓度较小,未检测到信号。Raman光谱结果显示,除Ce:CLN晶体的A(TO)模波数和A(TO)模半峰宽较纯的LiNbO晶体发生明显变化外,其余模都与其基本一致,表明铈离子主要进入晶格的Nb位置。关键词:掺铈铌酸锂单晶;提拉法;X射线光电子谱;Raman光谱中图分类号:O782 文献标志码:A 文章编号:0454–5648(2012)03–0412–04 网络出版时间:2012–02–17 14:13:39 KI:11-2310/ 网络出版地址:s/detail/ Growth and Characterization of Ce-Doped Lithium Niobate Crystal ZHANG Nana,WANG Jiyang,YAN Tao,HAN Shujuan,GUO Yongjie (State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China) Abstract: The Ce-doped congruent lithium niobabe (Ce:CLN) single crystal was grown by the Czochralski method. The result by X-ray diffraction shows that the as-grown crystal exhibits a single-phase (R3c) LN, and the doping of Ce ions into the CLN crystal lattice does not affect its basic crystal structure. The effective segregation coefficient of Ce ions determined by X-ray fluorescence analysis was . At room temperature, the transmittance of as-grown crystal was 75% in the range of 700–3500nm. The influence of Ce incorporation into CLN crystal lattice on the electronic a