稀土离子在LiYF_4晶体中的有效分凝系数  

EFFECTIVE SEGREGATION COEFFICIENT OF RARE EARTH IONS IN LiYF_4 CRYSTALS

作　　者：那木吉拉图[1] 袁兵[1] 阮永丰[1] 袁静[1] 

机构地区：[1]天津大学理学院物理系

出　　处：《硅酸盐学报》2001年第6期584-586,共3页Journal of The Chinese Ceramic Society

摘　　要：在CF4气氛中成功地生长出高质量的掺三价稀土离子的LiYF4晶体 ,测试了 16种稀土离子在LiYF4晶体中的有效分凝系数 .三价稀土离子在LiYF4晶体中的有效分凝系数随离子半径变化是有规律的 ,离子半径小于Y3 +的稀土离子的有效分凝系数都大于 1,离子半径大于Y3 +的稀土离子的有效分凝系数都小于 1,并且后者随离子半径增大而单调减小 .这种变化规律主要与离子进入晶体后对晶胞的畸变作用有关 .Pure and trivalent rare_earth ions doped LiYF 4 crystals with high quality were successfully grown in CF 4 atmosphere by Czochlalski method. The effective segregation coefficients of 16 kinds of trivalent rare_earth ions in LiYF 4 crystals were measured. It is found that the coefficients of the rare_earth ions in LiYF 4 crystals are almost larger than 1 when their radius are smaller than that of Y 3+ ion, and smaller than 1 when the radius are larger than that of Y 3+ ion. The reason for this is discussed from the viewpoint of deformation of the crystal cell.

关 键 词：氟化钇锂晶体 引上法晶体生长 有效分凝系数 稀土离子 激光晶体 LiYF4 

分 类 号：TN244[电子电信—物理电子学] O614.332[理学—无机化学]