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Studies on phase transitions of rare earth tantalates (Sm(1-x)Ln(x))(3)TaO7 (Ln = Nd, Eu) with fluorite-related structure
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| Title: | Studies on phase transitions of rare earth tantalates (Sm(1-x)Ln(x))(3)TaO7 (Ln = Nd, Eu) with fluorite-related structure |
| Authors: | Hinatsu, Yukio Browse this author | | Doi, Yoshihiro Browse this author →KAKEN DB |
| Keywords: | Phase transition | | Samarium | | Tantalum | | Oxides | | Fluorite-related structure | | DTA |
| Issue Date: | May-2019 |
| Publisher: | 社団法人 日本セラミックス協会 |
| Journal Title: | Journal of the Ceramic Society of Japan |
| Volume: | 127 |
| Issue: | 5 |
| Start Page: | 273 |
| End Page: | 278 |
| Publisher DOI: | 10.2109/jcersj2.18219 |
| Abstract: | The phase transition of Sm3TaO7 with orthorhombic fluorite-related structure was investigated. Solid solutions (Sm1-xNdx)(3)TaO7 and (Sm1-xEux)(3)TaO7 were prepared, and their structures at room temperature are well described with the space group C222(1). The phase transition temperature for (Sm1-xNdx)(3)TaO7 decreases from 1340 K with increasing Nd concentration, while that for (Sm1-xEux)(3)TaO7 increases with Eu concentration. However, both of these solid solutions show the same trend, i.e., with decreasing average rare earth radii, the phase transition temperature of (Sm(1-x)Ln(x))(3)TaO7 (Ln = Nd, Eu) increases. This trend is the same as that observed for Ln(3)MO(7) (M = Mo, Ru, Re, Os, or Ir). That is, the phase transition occurs with lattice contraction. Above the transition temperature, crystal structures for (Sm(1-x)Ln(x))(3)TaO7 (Ln = Nd, Eu) are well described with space group Pnma. (C) 2019 The Ceramic Society of Japan. All rights reserved. |
| Rights: | https://creativecommons.org/licenses/by-nd/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/76028 |
| 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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