English  |  正體中文  |  简体中文  |  Items with full text/Total items : 70548/70548 (100%)
Visitors : 23125738      Online Users : 291
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/987654321/39327

    Contributors: 物理研究所
    Date: 1993
    Issue Date: 2010-07-08 14:12:13 (UTC+8)
    Publisher: 中央大學
    Abstract: The magnetic ordering of Pr in tetragonal PrBa2Cu2.7Zn0.3O7-y has been studied by neutron-diffraction measurements. In this Zn-doped system, where 15 at.% of the Cu atoms located in the CuO2-plane layers have been replaced by Zn atoms, the magnetic structure of Pr is different from that found in the undoped system. The basic magnetic structure of Pr in the present Zn-doped compound consists of a simple antiferromagnetic arrangement in the tetragonal ab plane with nearest-neighbor spins along the c axis aligned parallel (ferromagnetic). This contrasts with the structure found in PrBa2Cu3O7, where Pr spins are arranged antiferromagnetically along all three crystallographic directions. The ordering temperature is almost-equal-to 17 K, with a moment of 0.70+/-0.07mu(B) directed along the c axis. Although the doping of Zn changes the magnetic structure of Pr, its Neel temperature and moment remain unaltered. Our order-parameter measurements give a value of 0.49+/-0.09 for the critical exponent beta of the staggered magnetization, suggesting that the magnetic phase transition observed is three dimensional in nature.
    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