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Magnetic properties of orthorhombic fluorite-related oxides Ln3SbO7 (Ln = rare earths)

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Title: Magnetic properties of orthorhombic fluorite-related oxides Ln3SbO7 (Ln = rare earths)
Authors: Hinatsu, Yukio Browse this author →KAKEN DB
Ebisawa, Haruka Browse this author
Doi, Yoshihiro Browse this author
Keywords: Magnetic properties
Rare earths
Oxides
Magnetic susceptibility
Specific heat
Antiferromagnetic transition
Issue Date: Jul-2009
Publisher: Elsevier Inc.
Journal Title: Journal of Solid State Chemistry
Volume: 182
Issue: 7
Start Page: 1694
End Page: 1699
Publisher DOI: 10.1016/j.jssc.2009.04.015
Abstract: Ternary 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.
Type: article (author version)
URI: http://hdl.handle.net/2115/38902
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 日夏 幸雄

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