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Experimental and theoretical study of magnetic ordering and local atomic polarization in Ru-substituted Lu_2Fe_(17)

机译：Ru-取代的Lu_2Fe_（17）的磁有序和局部原子极化的实验和理论研究

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摘要

The distribution of magnetic moments in the iron-rich intermetallic compound Lu_2Fe_(17) with Fe partly substituted by Ru has been investigated on Lu_2Fe_(16.5)Ru_(0.5) by using several techniques. The crystal structure and temperature evolution of the magnetic structure was studied using high resolution and high flux neutron powder diffractometers. In contrast to the parent Lu_2Fe_(17), which transforms on cooling from an antiferromagnetic to a ferromagnetic state, Lu_2Fe_(17)Ru_(0.5) is an antiferromagnet (Neel temperature T_N = 208 K) down to the lowest temperatures. The magnetic polarization at the lutetium L_(2.3) absorption edges, iron K and ruthenium L_2 edges was studied by x-ray magnetic circular dichroism (XMCD) on a single crystal of Lu_2Fe_(16.5)Ru_(0.5) in a magnetic field of 3 T, i.e., above the field-induced metamagnetic transition. The Ru XMCD signal proves the existence of induced magnetic polarization parallel to the dominant Fe sublattice magnetization. A corresponding theoretical analysis in the framework of the local spin density formalism is provided in order to discern the structural disorder effects and magnetism in the system.
机译：利用多种技术，在Lu_2Fe_（16.5）Ru_（0.5）上研究了富铁的金属间化合物Lu_2Fe_（17）中Fe部分被Ru取代时的磁矩分布。使用高分辨率和高通量中子粉末衍射仪研究了磁性结构的晶体结构和温度演变。与母体Lu_2Fe_（17）在冷却时从反铁磁状态转变为铁磁状态相反，Lu_2Fe_（17）Ru_（0.5）是反铁磁体（Neel温度T_N = 208 K）直至最低温度。通过X射线磁圆二色光谱（XMCD）在磁场为3的Lu_2Fe_（16.5）Ru_（0.5）晶体上研究了L L_（2.3）吸收边缘，铁K和钌L_2边缘的磁极化。 T，即高于磁场感应的超磁跃迁。 Ru XMCD信号证明了与主铁亚晶格磁化强度平行的感应磁极化的存在。在局部自旋密度形式主义的框架内提供了相应的理论分析，以便辨别系统中的结构无序效应和磁性。

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  • 来源
    《Physical review》 |2014年第9期|094420.1-094420.10|共10页
  • 作者

    E. A. Tereshina; O. Isnard; A. Smekhova; A. V. Andreev; A. Rogalev; S. Khmelevskyi;

  • 作者单位

    Institute of Physics, Academy of Sciences of the Czech Republic, Prague 18221, Czech Republic;

    Institut Neel, CNRS/Universite Grenoble Alpes, BP166, Grenoble 38042, France;

    Faculty of Physics, M. V. Lomonosov Moscow State University, Moscow 119991,Russia,European Synchrotron Radiation Facility, BP 220, Grenoble 38043, France;

    Institute of Physics, Academy of Sciences of the Czech Republic, Prague 18221, Czech Republic;

    European Synchrotron Radiation Facility, BP 220, Grenoble 38043, France;

    Vienna University of Technology, Department of Applied Physics, Vienna 1040, Austria;

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  • 正文语种 eng
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  • 关键词

    X-ray absorption spectra; electron density of states and band structure of crystalline solids;

    机译：X射线吸收光谱;态固体的电子密度和能带结构;

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