English  |  正體中文  |  简体中文  |  Items with full text/Total items : 49521/84657 (58%)
Visitors : 7597243      Online Users : 86
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27701


    Title: Electronic structures of La0.7-xCsxCa0.3MnO3 probed by X-ray absorption spectroscopy
    Authors: Chandra, Usha;Jan, J. C.;Chiou, J. W.;Asokan, K.;彭維鋒;Pong, W. F.
    Contributors: 淡江大學物理學系
    Keywords: XANES;Manganites;Monovalent ions
    Date: 2003-01
    Issue Date: 2009-12-31 10:38:27 (UTC+8)
    Publisher: Elsevier
    Abstract: We report X-ray absorption near edge structure (XANES) spectra of La0.7−xCsxCa0.3MnO3 (x=0, 0.01, 0.05, 0.1) at the Mn, O K- and Mn L3,2-edges. In a stoichiometric compound, the substitution of Cs for La-site could drive a fraction of Mn ions to 5+ valency state. The experimental XANES spectra at Mn K-edge do not support such a proposal. To account this result, one needs to consider the effect of ionic radius of Cs. It is likely that both ionic radius of Cs and valency of Mn act in opposite directions. The XANES spectra both at O K-, and Mn L3,2-edges exhibit prominent changes due to Cs doping, such observed changes are explained by considering Mn 3d–O 2p hybridization and the crystal field effects of Mn ions.
    Relation: Nuclear Instruments and Methods in Physics Research Section B 199, pp.185-189
    DOI: 10.1016/S0168-583X(02)01423-4
    Appears in Collections:[物理學系暨研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat
    0KbUnknown237View/Open
    index.html0KbHTML23View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.


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