2024-03-29T10:46:06Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/389022022-11-17T02:08:08Zhdl_2115_20039hdl_2115_116Magnetic properties of orthorhombic fluorite-related oxides Ln3SbO7 (Ln = rare earths)Hinatsu, YukioEbisawa, HarukaDoi, YoshihiroMagnetic propertiesRare earthsOxidesMagnetic susceptibilitySpecific heatAntiferromagnetic transition431Ternary rare earth antimonates Ln3SbO7 (Ln = rare earths) were prepared and their structures were determined by x-ray diffraction measurements. They crystallize in an orthorhombic superstructure of cubic fluorite (space group Cmcm for Ln = La, Pr, Nd; C-222_[1] for Ln = Nd~Lu), in which Ln3+ ions occupy two different crystallographic sites (the 8-coordinated and 7-coordinated sites). Their magnetic properties were characterized by magnetic susceptibility and specific heat measurements from 1.8 to 400 K. The Ln3SbO7 (Ln = Nd, Gd-Ho) compounds show an antiferromagnetic transition at 2.2~3.2 K. Sm3SbO7 and Eu3SbO7 show van Vleck paramagnetism. Measurements of the specific heat down to 0.4 K for Gd3SbO7 and the analysis of the magnetic specific heat indicate that the antiferromagnetic ordering of the 8-coordinated Gd ions occur at 2.6 K, and the 7-coordinated Gd ions order at a furthermore low temperature.Elsevier Inc.Journal Articleapplication/pdfhttp://hdl.handle.net/2115/38902https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/38902/1/182-7_p1694-1699.pdf0022-4596Journal of Solid State Chemistry1827169416992009-07enginfo:doi/10.1016/j.jssc.2009.04.015author