The Jahn-Teller effect of layered perovskite manganites La2-2xSr1+2xMn2O7 studied by mn K-edge XAFS
Wang, AH; Liu T(刘涛); Liu, T; Liu, Y; Cao, GH
刊名PHYSICA B-CONDENSED MATTER
2005
卷号363期号:1-4页码:#REF!
关键词EXAFS Jahn-Teller distortion Debye-Waller factor layered perovskite manganites
学科分类Physics
DOI10.1016/j.physb.2005.03.012
通讯作者Wang, AH (reprint author), Beijing Univ Sci & Technol, Dept Mat Phys & Chem, Beijing 100083, Peoples R China.
文章类型Article
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.
类目[WOS]Physics, Condensed Matter
收录类别SCI
WOS记录号WOS:000229654700017
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226259
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
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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!.
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