双钙钛矿氧化物Sr_(2-x)□_xFeMoO_6的晶体结构  

The crystal structure of double perovskite oxides Sr_(2-x)□_xFeMoO_6

作　　者：杨聚宝[1] 胡艳春[1] 胡华杰[2] 陈晨[1] 张克磊[1] 杨海刚[1] 马恒[1] 

机构地区：[1]河南师范大学物理与电子工程学院,河南新乡453007 [2]信阳师范学院物理与电子工程学院,河南信阳464000

出　　处：《功能材料》2013年第13期1863-1867,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(11074066);河南师范大学博士科研启动金资助项目(01026500109);河南省科技厅科技攻关资助项目(102102210186;102102210184)

摘　　要：采用传统高温固相反应法制备了空位掺杂的系列样品Sr2-x□xFeMoO6(0≤x≤0.04),详细研究了其晶体结构。X射线粉末衍射结果表明该系列样品均为四方晶系,空间群为I4/m。晶胞参数随掺杂量有明显的变化趋势。空位的含量调控反位缺陷的浓度,Fe/Mo有序度从未掺杂时的91.02%降低到x=0.04时的61.26%。由Rietveld精修得到该系列样品详细的布拉格衍射峰的峰位信息。The series of Sr2-x□xFeMoO6（0≤x≤0.04） were prepared by standard solid-state reaction.The crystal structures for the ordered double perovskite oxides are investigated.The GSAS refinements of X-ray powder diffraction show that all the samples are single phase and have the I4/m symmetry.Crystal parameters of the series have obvious change with vacancy doping.The anti-site defect in Sr2FeMoO6 was 91.02% and decrease to 61.26% for Sr1.96□0.4FeMoO6.The Bragg diffraction peak information was obtained from the GSAS refinements of X-ray powder diffraction.

关 键 词：X射线粉末衍射 晶体结构 空位掺杂 磁性材料 

分 类 号：TM27[一般工业技术—材料科学与工程]