English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 62567/95223 (66%)
造访人次 : 2524380      在线人数 : 36
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻

    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/72609

    题名: Electronic and local atomic structures of (La1-xPrx)0.85Zr0.15MnO3 studied by X-ray absorption spectroscopy
    作者: Krishna Kumar, K. P.;Chiou, J.W.;Tsai, H.M.;Pao, C.W.;Jan, J.C.;Hsu, P.C.;Ling, D.C.;Chien, F.Z.;Pong, W.F.;Tsai, M.H.;Lee, J.F.
    贡献者: 淡江大學物理學系
    日期: 2005
    上传时间: 2011-10-24 10:40:25 (UTC+8)
    摘要: Mn L3,2-, K-, O K- and Pr M5,4-edge x-ray absorption near-edge structure (XANES) spectra of (La1−xPrx)0.85Zr0.15MnO3 (LPZMO) with x = 0, 0.05, 0.1, 0.15 and 0.2 were measured to study the electronic structure and the effect of Pr substitution. An analysis of Mn L3,2- and K-edge spectra indicates that LPZMO is an electron-doped system. Pr substitution is found to increase the average effective charge of Mn ions and to induce an additional unoccupied majority spin (\uparrow spin) eg subband in the Mn L3,2-edge XANES spectrum. Mn L3,2-, O K- and Pr M5,4-edge XANES results demonstrate that the substitution of La ions by smaller Pr ions changes O 2p–Mn 3d and O 2p–Pr 4f hybridized states. Extended x-ray absorption fine structure (EXAFS) analysis at the Mn K edge reveals clear changes in local atomic structure around Mn ions due to the Pr substitution. XANES and EXAFS analyses show a small distortion in the MnO6 octahedron or a disorder in the lattice, which may be due to localization of charge carriers and/or the increased effective positive charge of Mn ions.
    關聯: Journal of physics condensed matter 17(26), pp.4197-4205
    DOI: 10.1088/0953-8984/17/26/017
    显示于类别:[物理學系暨研究所] 期刊論文


    档案 描述 大小格式浏览次数
    Electronic and local atomic structures of (La1-xPrx)0.85Zr0.15MnO3 studied by X-ray absorption spectroscopy.pdf825KbAdobe PDF2检视/开启



    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈