English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 57042/90725 (63%)
造访人次 : 12437090      在线人数 : 81
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: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/50353

    题名: Effect of Co, Ni, and Cu substitution on the electronic structure of hexagonal YMnO3 studied by x-ray absorption spectroscopy
    作者: Asokan, K.;Chen, Y. S.;Pao, C. W.;Tsai, H. M.;Lee, C. W. O.;Lin, C. H.;Hsueh, H. C.;Ling, D. C.;Pong, W. F.;Chiou, J. W.;Tsai, M.-H.;Peña, O.;Moure, C.
    贡献者: 淡江大學物理學系
    关键词: density functional theory;doping profiles;manganese compounds;XANES;yttrium compounds
    日期: 2009-09
    上传时间: 2010-08-09 15:47:54 (UTC+8)
    出版者: College Park: American Institute of Physics (AIP)
    摘要: X-ray absorption spectroscopy measurements have been performed to elucidate local electronic and atomic structures of orthorhombic 3d-transition metal-doped yttrium manganites (YMnO3) with chemical formulae YMn2/3Me1/3O3 (Me = Co, Ni, and Cu). The Mn L3- and K-edges x-ray absorption near-edge structure (XANES) demonstrate the direct substitution of Me2+ for Mn3+, so that the positive effective charge of Mn ions are increased. Me-doping is also found to induce substantial broadening of the Mn L3-edge feature, which suggests enhancement of the delocalization of Mn 3d eg subbands and conductivity. Local spin density approximation (LSDA)+U (Hubbard U parameter) calculations were used to understand their electronic structures.
    關聯: Applied Physics Letters 95(13), pp.131901(3 pages)
    DOI: 10.1063/1.3224905
    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
    0003-6951_95(13)p131901.pdf538KbAdobe PDF449检视/开启



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