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Identifying local dopant structures and their impact on the magnetic properties of spintronic materials

机译:识别局部掺杂剂结构及其对自旋电子材料磁性的影响

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摘要

The local structures of transition-metal dopant atoms in semiconductor host lattices of dilute magnetic semiconductors are determined using resonant inelastic x-ray scattering. Ligand field multiplet calculations are employed to analyze experimental data and show when dopant atoms substitute into the lattice and when they form metallic or oxide clusters. For ZnO doped with Mn, low-temperature ferromagnetism is shown to be intrinsic, but can be quenched by the formation of MnO clusters. For CeO_2 doped with Co, room-temperature ferromagnetism is due to clusters of Co, while substitution into the lattice leads to paramagnetic behavior.
机译:使用共振非弹性x射线散射确定稀磁性半导体的半导体主晶格中过渡金属掺杂剂原子的局部结构。配体场多重态计算可用于分析实验数据,并显示何时掺杂原子取代到晶格中以及何时它们形成金属或氧化物簇。对于掺杂了Mn的ZnO,低温铁磁性被证明是固有的,但是可以通过形成MnO团簇来淬灭。对于掺有Co的CeO_2,室温铁磁性是由于Co的团簇引起的,而代入晶格则导致顺磁行为。

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  • 来源
    《Physical review》 |2011年第11期|p.115207.1-115207.6|共6页
  • 作者单位

    Department of Physics and Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon,Saskatchewan, Canada S7N 5E2;

    Department of Physics and Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon,Saskatchewan, Canada S7N 5E2;

    Department of Physics and State Key Laboratory of Surface Physics, Fudan University, 220 Handan Road,Shanghai 200433, China;

    Institut de Physique et Chimie des Materiaux de Strasbourg (IPCMS), UMR 7504 UDS-CNRS (UDS-ECPM),23 rue du Loess, BP 43, F-67034 Strasbourg Cedex 2, France;

    Institute of Metal Physics, Russian Academy of Sciences-Ural Division, 620990 Yekaterinburg, Russia;

    Department of Physics and Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon,Saskatchewan, Canada S7N 5E2;

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

    crystal and ligand fields; Ⅱ-Ⅵ semiconductors; other nonmetals; X-ray scattering;

    机译:晶体和配体场;Ⅱ-Ⅵ半导体;其他非金属;X射线散射;

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