Crystal structure and Rietveld refinement of the new ternary compound Al_(14)Nd_5Si  

作　　者：HE Wei ZHANG Jiliang ZENG Lingmin YU Meihua XIA Xiuwen 

机构地区：[1]Key Laboratory of Nonferrous Metal Materials and New Processing Technology of the Ministry of Education of China, Guangxi University, Nanning 530004 China [2]Institute of Materials Science, College of Physics Science and Technology, Cruangxi University, Nanning 530004, China

出　　处：《Rare Metals》2008年第6期623-626,共4页稀有金属（英文版）

基　　金：financially supported by the Natural Sci-ence Foundation of Guangxi Province, China (No. 0575001)

摘　　要：The new ternary compound Al14NdsSi has been studied by means of the X-ray powder diffraction technique and the Rietveld method. The ternary compound Al14Nd5Si has a hexagonal Ni3Sn-type structure with space group P63/mmc （No.194）, the lattice parameters are a = 0.64470 （2） nm and c = 0.45926 （1） nm. The Smith and Snyder figure of merit for the index, FN, is F30 = 97.8 （30）. The X-ray diffraction data indicated that the crystal structure of the compound Al14Nd5Si has been successfully refined by the Rietveld method. The R-factors of Rietveld refinement are Rp = 0.088 and Rwp = 0.120, respectively. The thermal dependence of magnetization for the compound was measured by a vibrating sample magnetometer. The experimentally determined magnetic effective paramagnetic moment is μeff= 3.60 μB per Nd atom. The paramagnetic Currie temperature θp = -33.7 K was also obtained from the Currie-Weiss law.The new ternary compound Al14NdsSi has been studied by means of the X-ray powder diffraction technique and the Rietveld method. The ternary compound Al14Nd5Si has a hexagonal Ni3Sn-type structure with space group P63/mmc （No.194）, the lattice parameters are a = 0.64470 （2） nm and c = 0.45926 （1） nm. The Smith and Snyder figure of merit for the index, FN, is F30 = 97.8 （30）. The X-ray diffraction data indicated that the crystal structure of the compound Al14Nd5Si has been successfully refined by the Rietveld method. The R-factors of Rietveld refinement are Rp = 0.088 and Rwp = 0.120, respectively. The thermal dependence of magnetization for the compound was measured by a vibrating sample magnetometer. The experimentally determined magnetic effective paramagnetic moment is μeff= 3.60 μB per Nd atom. The paramagnetic Currie temperature θp = -33.7 K was also obtained from the Currie-Weiss law.

关 键 词：CRYSTALLOGRAPHY magnetic properties Reitveld method rare earth compound 

分 类 号：O64[理学—物理化学]