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Measurement and simulation of anisotropic magnetoresistance in single GaAs/MnAs core/shell nanowires

机译：GaAs / MnAs核/壳纳米线中各向异性磁阻的测量与仿真

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摘要

We report four probe measurements of the low field magnetoresistance (MR) in single core/shell GaAs/MnAs nanowires (NWs) synthesized by molecular beam epitaxy, demonstrating clear signatures of anisotropic magnetoresistance that track the field-dependent magnetization. A comparison with micromagnetic simulations reveals that the principal characteristics of the magnetoresistance data can be unambiguously attributed to the nanowire segments with a zinc blende GaAs core. The direct correlation between magnetoresistance, magnetization, and crystal structure provides a powerful means of characterizing individual hvbrid ferromagnet/semiconductor nanostructures.
机译：我们报告了通过分子束外延合成的单核/壳GaAs / MnAs纳米线（NWs）中的低场磁阻（MR）的四个探针测量，证明了各向异性磁阻的清晰特征，可追踪依赖于磁场的磁化强度。与微磁模拟的比较表明，磁阻数据的主要特征可以明确地归因于具有锌混合GaAs核的纳米线段。磁阻，磁化强度和晶体结构之间的直接关系提供了表征单个混合铁磁体/半导体纳米结构的有力手段。

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  • 来源
    《Applied Physics Letters》 |2012年第18期|p.182402.1-182402.5|共5页
  • 作者

    J. Liang; J. Wang; A. Paul; B. J. Cooley; D. W. Rench; N. S. Delias; S. E. Mohney; R. Engel-Herbert; N. Samarth;

  • 作者单位

    Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA,Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;

    Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA,Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;

    Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA,Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;

    Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA,Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;

    Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA,Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;

    Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA,Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;

    Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA,Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;

    Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA,Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;

    Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA,Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;

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