English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 49200/83641 (59%)
造访人次 : 7097295      在线人数 : 48
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/987654321/27545

    题名: Valence state of CeAl2 nanoparticles studied by Ce L3-edge x-ray absorption spectroscopy
    作者: Chang, C. L.;Dong, C. L.;Huang, C. L.;Chen, Y. Y.
    贡献者: 淡江大學物理學系
    日期: 2000-04
    上传时间: 2009-12-31 10:19:42 (UTC+8)
    出版者: College Park: American Institute of Physics (AIP)
    摘要: We report measurements of the Ce L3-edge x-ray absorption near-edge structure on CeAl2 nanoparticles with average diameters of 80 Å. The Ce exhibits a mixed valence with a small amount of tetravalent Ce, which is in contrast to the purely trivalent Ce observed in bulk CeAl2. A shift in the absorption edge to higher energy and a narrower linewidth are also observed in the nanoparticle samples. These spectral differences are attributed to surface effects caused by the small particle size, including a lower coordination number and higher surface pressure. The observation of nonmagnetic tetravalent Ce with the 4f0 configuration is in good agreement with the small values of magnetic entropy seen in low temperature specific heat measurements. © 2000 American Institute of Physics.
    關聯: Journal of Applied Physics 87(7), pp.3349-3350
    DOI: 10.1063/1.372347
    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
    0021-8979_87(7)p3349-3350.pdfPDF全文24KbAdobe PDF648检视/开启



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