The Jahn-Teller effect of layered perovskite manganites La2-2xSr1+2xMn2O7 studied by mn K-edge XAFS
文献类型：期刊论文
| 作者 | Wang, AH; Liu T(刘涛); Liu, T; Liu, Y; Cao, GH |
| 刊名 | PHYSICA B-CONDENSED MATTER
 |
| 出版日期 | 2005 |
| 卷号 | 363期号:1-4页码:#REF! |
| 关键词 | EXAFS Jahn-Teller distortion Debye-Waller factor layered perovskite manganites |
| 通讯作者 | Wang, AH (reprint author), Beijing Univ Sci & Technol, Dept Mat Phys & Chem, Beijing 100083, Peoples R China. |
| 英文摘要 | The lattice distortion and local symmetry of bilayered perovskite manganites play an important role in its magnetoelectric transport properties, in particular, the effect of the colossal magnetoresistance (CMR) found in this new member of CMR family. In order to explore the structural origin, X-ray absorption fine structure (XAFS) spectra at both near edge and extended part were measured at Mn K-edge of the bilayered perovskite manganites, La2-2xSr1 +2xMn2O7 with x = 0.2, 0.3, 0.33, 0.4, 0.5 and 0.6. The XAFS oscillations from the first coordination shell of Mn-O were filtered out and analyzed in more detail aimed at investigating the lattice distortion with respect to this Mn-O octahedron. Despite lattice shrinkage due to substitution of La with Sr which has to be a close atom radius, the largest derivation from the Gaussian distribution of the Mn-O shell arose from the 0.33 doped sample. In a more sophisticated fit, we found that the JT distortion magnitude Delta(JT) and Debye-Waller factors sigma(1)(2) and sigma(2)(2) are the highest at the same doping concentration x = 0.33. (c) 2005 Elsevier B.V. All rights reserved. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Condensed Matter |
| 收录类别 | SCI |
| WOS记录号 | WOS:000229654700017 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/226259]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 推荐引用方式 GB/T 7714 | Wang, AH,Liu T,Liu, T,et al. The Jahn-Teller effect of layered perovskite manganites La2-2xSr1+2xMn2O7 studied by mn K-edge XAFS[J]. PHYSICA B-CONDENSED MATTER,2005,363(1-4):#REF!. |
| APA | Wang, AH,刘涛,Liu, T,Liu, Y,&Cao, GH.(2005).The Jahn-Teller effect of layered perovskite manganites La2-2xSr1+2xMn2O7 studied by mn K-edge XAFS.PHYSICA B-CONDENSED MATTER,363(1-4),#REF!. |
| MLA | Wang, AH,et al."The Jahn-Teller effect of layered perovskite manganites La2-2xSr1+2xMn2O7 studied by mn K-edge XAFS".PHYSICA B-CONDENSED MATTER 363.1-4(2005):#REF!. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。