文献类型：期刊文献

英文题名：Synthesis, crystal structure and magnetic property of Sm2-xCoxTi2-xNbxO7 (x = 0, 0.2, 0.4)

作者：Li, X.L.[1,2]; Song, Y.W.[1,2]; Xiong, H.[1,2]; Jia, Y.Q.[1,2]; Matsushita, N.[3]; Xuan, Y.[4]

机构：[1] Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China; [2] State Key Lab of Rare Earth Materials Chemistry and Applications, Peking University, Beijing 100871, China; [3] Department of Physical Electronics, Tokyo Institute of Technology, Tokyo 152, Japan; [4] Department of Inorganic Materials, Tokyo Institute of Technology, Tokyo 152, Japan

年份：2003

卷号：77

期号：3

起止页码：625

外文期刊名：Materials Chemistry and Physics

收录：EI(收录号：2002397106177)

语种：英文

外文关键词：Crystal structure - Ferrimagnetism - Lattice constants - Magnetic susceptibility - Paramagnetism - Synthesis (chemical)

摘要：Sm2-xCoxTi2-xNbxO7 (x=0, 0.2, 0.4) were synthesized by a wet chemical method. The compounds possess pyrochlore structure with cubic face-central cell. The lattice parameter (a) is 1.0234nm for Sm2Ti2O7, 1.0231nm for Sm1.8Co0.2Ti1.8Nb0.2O7 and 1.0225nm for Sm1.6Co0.4Ti1.6Nb0.4O7. Sm2Ti2O7 may possess the Van Vleck paramagnetism. The variation of the magnetic susceptibility of Sm2-xCoxTi2-xNbxO7 (x=0.2, 0.4) with temperature is similar to that of a ferrimagnet in the paramagnetic region. The satisfactory fitting to the experimental plot of the inverse susceptibility of Sm2-xCoxTi2-xNbxO7 (x=0.2, 0.4) vs. temperature indicates that the compounds may be a canted ferrimagnet. ? 2002 Elsevier Science B.V. All rights reserved.