...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Quantification of the magnetic exchange via element-selective high-field magnetometry: Co-doped ZnO epitaxial films
【24h】

Quantification of the magnetic exchange via element-selective high-field magnetometry: Co-doped ZnO epitaxial films

机译：通过元素选择性高场磁力分析法对磁交换进行定量：共掺杂ZnO外延膜

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We have measured the element specific M(H) curves for 5%, 10%, and 15% Co-doped ZnO epitaxial films with high crystalline perfection using x-ray magnetic circular dichroism (XMCD). The XMCD(H) curves do not saturate up to 17 T directly evidencing antiferromagnetic exchange between neighboring Co dopant atoms. Angular-dependent XMCD(H) measurements in combination with theoretical calculations based on a well-established model Hamiltonian allow to determine both the next-neighbor exchange J as well as the single ion anisotropy D quantitatively. While for 5% and 10% Co doping, J = 15 K and D = 3K, for 15% Co doping, they are reduced to 10 and 2 K, respectively. High-field, element selective magnetometry based on XMCD is thus shown to be a suitable technique to determine microscopic magnetic parameters even in thin epitaxial films of dilute magnetic systems.
机译：我们已经使用X射线磁圆二向色性（XMCD）测量了5％，10％和15％的Co掺杂的ZnO外延膜的元素比M（H）曲线，具有高的晶体完美度。 XMCD（H）曲线不饱和到17 T，直接表明相邻Co掺杂原子之间的反铁磁交换。角度相关的XMCD（H）测量与基于完善模型哈密顿量的理论计算相结合，可以定量确定下一个邻域交换J和单个离子各向异性D。对于5％和10％的Co掺杂，J = 15 K和D = 3K，对于15％的Co掺杂，它们分别减小到10和2K。因此，即使在稀磁系统的外延薄膜中，基于XMCD的高场元素选择性磁法也被证明是一种确定微观磁参数的合适技术。

著录项

  • 来源
    《Physical review》 |2012年第24期|p.245202.1-245202.8|共8页
  • 作者

    A. Ney; V. Ney; F. Wilhelm; A. Rogalev; K. Usadel;

  • 作者单位

    Fakultaet fuer Physik, Universitaet Duisburg-Essen, Lotharstr. 1, D-47057 Duisburg, Germany,Institut fur Halbleiter- und Festkoerperphysik, Johannes Kepler Universitaet, A-4040 Linz, Austria;

    Fakultaet fuer Physik, Universitaet Duisburg-Essen, Lotharstr. 1, D-47057 Duisburg, Germany,Institut fur Halbleiter- und Festkoerperphysik, Johannes Kepler Universitaet, A-4040 Linz, Austria;

    European Synchrotron Radiation Facility (ESRF), 6 Rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France;

    European Synchrotron Radiation Facility (ESRF), 6 Rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France;

    Fakultaet fuer Physik, Universitaet Duisburg-Essen, Lotharstr. 1, D-47057 Duisburg, Germany;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    X-ray absorption spectra; crystal-field theory and spin hamiltonians; magnetic properties of monolayers and thin films;

    机译：X射线吸收光谱;晶体场理论和自旋哈密顿论;单层和薄膜的磁性;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号