摘要
利用柠檬酸盐前驱物法制备了La2-xNdxCa2MnO7系列样品,并利用Rietveld方法对结构进行了精修。结果表明:体系中存在两个单相区(x≤1.0,x≥1.5)和一个两相区(1.0<x<1.5)。体系这种结构变化可以用稀土离子半径变化说明。
La2-xNdxCa2MnO7 samples were prepared from citric acid sol-gel precursor using solid state reaction. The cell parameters of these samples were refined using Rietveld method, which evidence the presence of single-phase regions ( x less than or equal to 1.0 and x greater than or equal to 1.5) and two-phase region 1.0 < x < 1.5. The structure variation of this system can be understood by considering the ionic size of rare earth cation.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2003年第1期59-63,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.20131010)
国家重点实验室基金资助。