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https://irlib.pccu.edu.tw/handle/987654321/2703
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| 題名: | Chemical size effect on the magnetic and electrical properties in the (Tb1-xEux)MnO3 (0 <= x <= 1.0) System |
| 作者: | Chan, T. S.;Liu, R. S.;Yang, C. C.;Li, W. -H.;Lien, Y. H.;Huang, C. Y.;Lee, J. -F. |
| 貢獻者: | 材料所 |
| 日期: | 2007 |
| 上傳時間: | 2009-11-16 10:30:27 (UTC+8) |
| 摘要: | The effect of isovalent chemical substitution of Eu3+ into the Tb3+ sites on the magnetic and electrical properties of (Tb1-xEux)MnO3 (0 <= x <= 1.0) system has been investigated. The orthorhombic structure with space group Pbnm is observed in this series of materials. An increase in Mn-O bond distance with increasing Eu content leads to improvement in the overlap between the Mn 3d and O 2p orbital thereby causing a decrease in activation energy and resistivity. Moreover, as the Eu content increases, the effective moments (mu(eff)) are reduced linearly and an exchange coupling is observed in Tb-Tb, Tb-Eu, and Eu-Eu complexes for x = 0.1 and 0.3 samples. Both these features can be related to the substitution of bigger Eu3+ ions replacing the original Tb-Tb coupling. |
| 關聯: | JOURNAL OF PHYSICAL CHEMISTRY B Volume: 111 Issue: 9 Pages: 2262-2267 |
| 顯示於類別: | [Department of Chemical & Materials Engineering] journal articles
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