English  |  正體中文  |  简体中文  |  Items with full text/Total items : 51258/86283 (59%)
Visitors : 8027456      Online Users : 71
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/987654321/25188


    Title: Rietveld analysis on Gd(Ba2−xAx)Cu3Oy (A = Ca, Sr) superconductors
    Authors: Kao, H.-C. I.;Chin, C. H.;Huang, R. C.;Wang, C. M.
    Contributors: 淡江大學化學學系
    Keywords: Calcination;Calcium;Composition;Oxygen;Perovskite;Sintering;Solubility;Strontium;Substitution reactions;Superconducting transition temperature;Superconductivity;X ray diffraction analysis;Conventional solid state reaction;Orthorhombicity;Partial substitution;Rietveld analysis;Oxide superconductors
    Date: 2000-11
    Issue Date: 2013-07-09 15:27:48 (UTC+8)
    Publisher: Amsterdam: Elsevier BV * North-Holland
    Abstract: Two series of single phase triple-perovskite superconducting samples with nominal compositions of Gd(Ba2−xCax)Cu3Oy (Ca series, 0 ≤ x ≤ 0.30) and Gd(Ba2−xSrx)Cu3Oy (Sr series, 0 ≤ x′ ≤ 1.0) were prepared. Orthorhombicity decreases with increasing amount of Ca or Sr substitution. Part of Ca ions occupy R site and push the same amount of Gd3+ ion into Ba site, attracting negative oxygen ions to randomly occupy O(4) and O(5) sites on the basal plane which leads to a further reduction of orthorhombicity in Gd(Ba2−xCax)Cu3Oy series compared with the same amount of substitution in Sr series, in which, Sr only occupies the Ba site. Tc is dependent on the orthorhombicity of these samples, no matter wheater it is Ca or Sr substitution.
    Relation: Physica C: Superconductivity and its Applications 341-348(PART 1), pp.623-624
    DOI: 10.1016/S0921-4534(00)00619-5
    Appears in Collections:[化學學系暨研究所] 期刊論文

    Files in This Item:

    File SizeFormat
    index.html0KbHTML132View/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