Eu3+ luminescence in La5Si2BO13 with apatite related structure and magnetic studies in Ln5Si2BO13 (Ln=Gd, Dy)

被引：9
作者：
Naidu, S. Asiri [1 ]
Varadaraju, U. V. [1 ]
Raveau, B. [2 ]
机构：
[1] Indian Inst Technol, Mat Sci Res Ctr, Madras 600036, Tamil Nadu, India
[2] Univ Caen, CNRS, Lab Crystallog & Sci Mat, ENSICAEN, F-14050 Caen 4, France
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2010年 / 183卷 / 08期
关键词：
Photoluminescence; Apatite; X-ray diffraction; Eu3+ as a structure probe; NEUTRON-DIFFRACTION; CRYSTAL-STRUCTURE; OCCUPATION; PROBE;
D O I：
10.1016/j.jssc.2010.05.034
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Eu3+ photoluminescence is studied in La5Si2BO13 with apatite related structure. La5-xEuxSi2BO13 [x=0.05, 0.1, 0.3, 0.5, 0.7, 1.0, 2.0] compositions are synthesized. The emission results shows that Eu3+ ions occupy two different cationic sites viz., La(1) and La(2). The increase in the intensity of D-5(0)-F-7(0) line with increasing Eu3+ content shows the preferential occupancy of Eu3+ in La(2) site due to the existence of short La(2)-O(4) (free oxide ion) bond. The observation of antiferromagnetic interactions in Gd and Dy analogues supports the structural features elucidates from photoluminescence studies. (C) 2010 Published by Elsevier Inc.
引用
收藏
页码：1847 / 1852
页数：6
相关论文
共 21 条
123