2013 Fiscal Year Final Research Report
Versatile structures of perovskite-type compounds containing rare-earth and their magnetic properties
| Project/Area Number |
23550065
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Inorganic chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
HINATSU Yukio 北海道大学, 理学(系)研究科(研究院), 教授 (70271707)
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| Research Collaborator |
SAKASHITA Ryosuke 北海道大学, 大学院・理学院化学専攻, 修士課程
YAMAZAKI Takahiro 北海道大学, 大学院・理学院化学専攻, 修士課程
ENDO Takeshi 北海道大学, 大学院・理学院化学専攻, 博士課程
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| Project Period (FY) |
2011 – 2013
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| Keywords | 希土類 / ぺロブスカイト / 結晶構造 / 磁気的性質 |
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| Research Abstract |
The perovskite-type compounds containing both rare earth and osmium Ba2LnOsO6 (Ln = Pr, Nd, Sm-Lu) have been prepared. Powder X-ray diffraction measurements and Rietveld analysis show that Ln3+ and Os5+ ions are structurally ordered at the M site of the perovskite BaMO3. Magnetic susceptibility and specific heat measurements show that an antiferromagnetic ordering of Os5+ ions has been observed for Ba2LnOsO6 (Ln = Pr, Nd, Sm, Eu, Lu) at 52-94 K. For Ba2TbOsO6 and Ba2YbOsO6, magnetic transitions due to the antiferromagnetic transition of the Tb3+ and Yb3+ are observed at 2.6 and 2.4 K, respectively. Neutron diffraction measurements for Ba2NdOsO6 show that the magnetic structure is of type I and the magnetic moments of Nd3+ and Os5+ ions are in the same direction in the ab-plane. Eu Mossbauer spectrum measurements show that the magnetic hyperfine field is 20 T.
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