淡江大學機構典藏:Item 987654321/27613
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 55597/89938 (62%)
造访人次 : 11049988      在线人数 : 83
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/987654321/27613


    题名: Electronic structures of Ba1-xCaxTiO3 studied by x-ray absorption spectroscopy and theoretical calculation
    作者: Asokan, K.;Jan, J. C.;Chiou, J. W.;彭維鋒;Pong, W. F.;Tsai, M. H.;Shih, H. L.;Chen, H.Y.;薛宏中;Hsueh, Hung-chung;Chuang, C. C.;Chang, Y. K.;Chen, Y. Y.;林諭男;Lin, I. N.
    贡献者: 淡江大學物理學系
    日期: 2001-12-03
    上传时间: 2009-12-31 10:30:03 (UTC+8)
    出版者: Bristol: Institute of Physics Publishing Ltd.
    摘要: We report O and Ca K-edges x-ray absorption near edge structure (XANES) spectra of Ba1-xCaxTiO3 (x = 0.01 and 0.08), BaTiO3 and CaTiO3 and the electronic structure of Ba0.875Ca0.125TiO3 obtained by first-principles calculation. The characteristic features in the O K-edge XANES spectra of these ferroelectric perovskites are influenced by the Ca concentration. They differ substantially from those of the reference TiO2. The O K-edge spectra suggest that the combination of the alkaline-earth-metal oxides, CaO and/or BaO, with TiO2 enhance the effective charge of the O ions. Thus, a large dipole moment may result from the displacement of the Ti ion from the centre of the TiO6 octahedron leading to collective displacement of Ti ions through attractive dipole-dipole couplings and may give rise to ferroelectricity. In the Ca K-edge XANES spectra there is a pre-edge feature similar to those found in other 3d transition-metal perovskites, which may provide information about hole doping.
    關聯: Journal of Physics: Condensed Matter 13(48), pp.11087-11095
    DOI: 10.1088/0953-8984/13/48/332
    显示于类别:[物理學系暨研究所] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    index.html0KbHTML344检视/开启
    index.html0KbHTML153检视/开启

    在機構典藏中所有的数据项都受到原著作权保护.

    TAIR相关文章

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