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Synthesis and magnetic properties of 12L-perovskites Ba4LnIr3O12 (Ln = lanthanides)

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Title: Synthesis and magnetic properties of 12L-perovskites Ba4LnIr3O12 (Ln = lanthanides)
Authors: Shimoda, Yuki Browse this author
Doi, Yoshihiro Browse this author →KAKEN DB
Wakeshima, Makoto Browse this author
Hinatsu, Yukio Browse this author →KAKEN DB
Keywords: Magnetic properties
Magnetic susceptibility
Specific heat
Issue Date: Oct-2009
Publisher: Elsevier Inc.
Journal Title: Journal of Solid State Chemistry
Volume: 182
Issue: 10
Start Page: 2873
End Page: 2879
Publisher DOI: 10.1016/j.jssc.2009.07.056
Abstract: New quadruple perovskite oxides Ba4LnIr3O12 (Ln = lanthanides) were prepared and their magnetic properties were investigated. They crystallize in the monoclinic 12L-perovskite-type structure with space group C2/m. The Ir3O12 trimers and LnO6 octahedra are alternately linked by corner-sharing and form the perovskite-type structure with 12 layers. The Ln and Ir ions are both in the tetravalent state for Ln = Ce, Pr, and Tb compounds (Ba4Ln^[4+]Ir^[4+]3O12), and for other compounds (Ln = La, Nd, Sm-Gd, Dy-Lu), Ln ions are in the trivalent state and the mean oxidation state of Ir ions is +4.33(Ba4Ln^[3+]Ir^[4.33+]3O12). An antiferromagnetic transition has been observed for Ln = Ce, Pr, and Tb compounds at 10.5, 35, and 16 K, respectively, while the other compounds are paramagnetic down to 1.8 K.
Type: article (author version)
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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