新型(Yb^3＋,La^3＋)∶Gd2SiO5和(Yb^3＋,Tb^3＋)∶GdTaO4单晶生长及分凝研究  

Growth of(Yb^(3+),La^(3+))∶Gd_2SiO_5 and(Yb^(3+),Tb^(3+))∶GdTaO_4 Single Crystal and Study on Its Doped Ions Segregation Coefficient

作　　者：宁凯杰[1,2] 张庆礼[1] 孙敦陆[1] 殷绍唐[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽省光子器件与材料重点实验室,合肥230031 [2]中国科学院研究生院,北京100049

出　　处：《人工晶体学报》2011年第4期817-821,827,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(90922003,50872135,50932005);中国科学院知识创新重要方向性项目(YYYJ-1002)资助课题

摘　　要：采用提拉法生长了尺寸为30 mm×50 mm的(Yb3+,La3+)∶Gd2SiO5单晶和尺寸为24 mm×57 mm的(Yb3+,Tb3+)∶GdTaO4单晶,用X射线荧光法测量了掺杂样品的组分浓度在晶体中的分布,拟合了掺杂离子的有效分凝系数,结果表明:Yb3+在Gd2SiO5晶体中的分凝系数为1.185(15),接近单位1,而La3+则为0.68(10),偏离单位1较多,对晶体的光学均匀性会有较大的影响;Yb3+和Tb3+在GdTaO4中的分凝系数为0.84(14)和0.84(5),接近单位1,对晶体的光学均匀性影响较小。The crystal（Yb3＋,La3＋）∶Gd2SiO5 with its size 30 mm×50 mm and crystal（Yb3＋,Tb3＋）∶GdTaO4 with its size 24 mm×57 mm were successfully grown by Czochralski method.The concentration distribution of doped ions in the crystals was detected by the X-ray fluorescence（XRF） spectroscopy and the effective segregation coefficients of doped ions were obtained by fitting calculation.The coefficient of Yb3＋ whose value is close unity in Gd2SiO5 crystal is 1.185（15）,and that of La3＋ whose value have a relatively larger deviation from unity is 0.68（10） will cause a greater influence on the optical homogeneity of the crystal.The coefficients of Yb3＋ and Tb3＋ in GdTaO4 crystal are 0.84（14） and 0.84（5） correspondingly,both of them a value close unit 1,which will affect optical homogeneity of the crystals.

关 键 词：(Yb3+ La3+)∶Gd2SiO5 (Yb3+ Tb3+)∶GdTaO4 晶体生长 有效分凝系数 

分 类 号：O782[理学—晶体学]