English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 49064/83170 (59%)
造访人次 : 6964340      在线人数 : 72
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/987654321/27524

    题名: The Magnetic Properties of Strained and Relaxed Fe3-xMgxO4 Ferrite Films on MgO(001) and SrTiO3(001) by Molecular Beam Epitaxy
    作者: 張經霖;Chang, C. L.;Lee, D. S.;Wang, J. S.;Modak, Dilip K.;Liu, Y. S.;Chern, G.
    贡献者: 淡江大學物理學系
    日期: 2007-05-01
    上传时间: 2009-12-31 10:14:49 (UTC+8)
    出版者: American Institute of Physics (AIP)
    摘要: The present study grows a series of Fe3-xMgxO4 (0≦x≦1.5) films and systematically measure both structure and magnetization of these films. These films are grown on MgO and SrTiO3 (STO), which have small (∼-0.3%) and large (∼7.5%) lattice mismatch in order to have either strained or relaxed films, by plasma-oxygen-assisted molecular beam epitaxy, respectively. X-ray diffraction (XRD) is carried out to analyze the crystalline structure. Saturation magnetization (Ms) of pure Fe3O4 (x=0) on both substrates is ∼500 emu/cm3, which is consistent with the bulk value. However, Ms has a fast decrease with increasing x for the films grown on MgO(001), from 340 to ∼100 emu/cm3 in the region of 0.3≪x≪1.35, and stays at ∼100 emu/cm3 for x≫1.35. On the other hand, Ms remains unchanged with x increasing from 0.3 to 1 for the film grown on STO. With x≫1, Ms drops abruptly to ∼100 emu/cm3, which is comparable to Ms of the film grown on MgO. The discrepancy in Ms of Fe3-xMgxO4 film grown on MgO and STO may imply that the cation distribution of these films may be fundamentally different. Possible cation distribution and the substrate strain effect will be discussed.
    關聯: Journal of Applied Physics 101(9), pp.09M532
    DOI: 10.1063/1.2712826
    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_101(9)p09M532.pdf122KbAdobe PDF535检视/开启



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