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Magnetic properties of orthorhombic fluorite-related oxides Ln3SbO7 (Ln = rare earths)
| 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)
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Submitter: 日夏 幸雄
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