政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/63537
English  |  正體中文  |  简体中文  |  Post-Print筆數 : 27 |  全文笔数/总笔数 : 113303/144284 (79%)
造访人次 : 50795778      在线人数 : 311
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU 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


    请使用永久网址来引用或连结此文件: https://nccur.lib.nccu.edu.tw/handle/140.119/63537


    题名: Ab initio studies of spin-spiral waves and exchange interactions in 3d transition metal atomic chains
    作者: 郭光宇
    Guo, Guang-Yu
    贡献者: 應物所
    日期: 2011.04
    上传时间: 2014-01-24 12:37:04 (UTC+8)
    摘要: The total energy of the transverse spin-spiral wave as a function of the wave vector for all transition metal atomic chains has been calculated within ab initio density functional theory with the generalized gradient approximation. It is predicted that at the equilibrium bond length, the V, Mn, and Fe chains have a stable spin-spiral structure, while the magnetic ground state of the Cr, Co, and Ni chains remains collinear. Furthermore, all the exchange interaction parameters of the transition metal chains are evaluated by using the calculated energy dispersion relations of the spin-spiral waves. Interestingly, it is found that the magnetic couplings in the V, Mn, and Cr chains are frustrated (i.e., the second near-neighbor exchange interaction is antiferromagnetic), and this leads to the formation of the stable spin-spiral structure in these chains. The spin-wave stiffness constant of these metal chains is also evaluated and is found to be smaller than its counterpart in bulk systems. The upper limit (on the order of 100 Kelvins) of the possible magnetic phase transition temperature in these atomic chains is also estimated within the mean-field approximation. The electronic band structure of the spin-spiral structures have also been calculated. It is hoped that the interesting findings here of the stable spin-spiral structure and frustrated magnetic interaction in the transition metal chains will stimulate further theoretical and experimental research in this field.
    關聯: Physical Review B, 83(14), 144403
    資料來源: http://link.aps.org/doi/10.1103/PhysRevB.83.144403
    数据类型: article
    DOI 連結: http://dx.doi.org/10.1103/PhysRevB.83.144403
    DOI: 10.1103/PhysRevB.83.144403
    显示于类别:[應用物理研究所 ] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    144403.pdf385KbAdobe PDF21817检视/开启


    在政大典藏中所有的数据项都受到原著作权保护.


    社群 sharing

    著作權政策宣告 Copyright Announcement
    1.本網站之數位內容為國立政治大學所收錄之機構典藏，無償提供學術研究與公眾教育等公益性使用，惟仍請適度，合理使用本網站之內容，以尊重著作權人之權益。商業上之利用，則請先取得著作權人之授權。
    The digital content of this website is part of National Chengchi University Institutional Repository. It provides free access to academic research and public education for non-commercial use. Please utilize it in a proper and reasonable manner and respect the rights of copyright owners. For commercial use, please obtain authorization from the copyright owner in advance.

    2.本網站之製作，已盡力防止侵害著作權人之權益，如仍發現本網站之數位內容有侵害著作權人權益情事者，請權利人通知本網站維護人員(nccur@nccu.edu.tw)，維護人員將立即採取移除該數位著作等補救措施。
    NCCU Institutional Repository is made to protect the interests of copyright owners. If you believe that any material on the website infringes copyright, please contact our staff(nccur@nccu.edu.tw). We will remove the work from the repository and investigate your claim.
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈