English  |  正體中文  |  简体中文  |  Items with full text/Total items : 65421/65421 (100%)
Visitors : 22297294      Online Users : 777
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU 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://ir.lib.ncu.edu.tw/handle/987654321/39106

    Title: Structural studies of the destruction of Cu-O chains in PrBa2Cu3O7 by Ga-doping
    Authors: Peng,JC;Hsieh,WT;Lee,KC;Li,WH;Yang,HD
    Contributors: 物理研究所
    Date: 1998
    Issue Date: 2010-07-08 14:05:04 (UTC+8)
    Publisher: 中央大學
    Abstract: Structural changes of the PrBa2Cu3O7 compound as Cu are partially replaced by Ga or Zn are studied by using high resolution neutron diffraction measurements. Rietveld method is followed in refining the diffraction patterns. Ga atom is found to enter the Cu site in the CuO-chain layers, that also causes the O in that layer to become disorder with equal probability to occupy the sites along the a and along the b axis directions. This effectively destroys the Cu-O chain ordering observed in the undoped system, and results in (Cu/Ga)-O chains run in both the a and b axis directions. Tetragonal symmetry for the Ga-doped compound is resulted. Zn atom, on the other hand, replaces the Cu in the CuO2-plane layer, which make no significant effect on the basic structure except a small oxygen disorder in the chain layers. The bond lengths of Pr and the O in the CuO2-plane layers increase slightly in the Ga-doped system, whereas that in the Zn-doped system remains basically unaffected.
    Appears in Collections:[物理研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明