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Relative contributions of surface and grain boundary scattering to the spin-polarized electrons transport in the AlN/NiFe/AlN heterostructures

机译:表面和晶界散射对AlN / NiFe / AlN异质结构中自旋极化电子输运的相对贡献

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摘要

When the film thickness approaches the electron mean free path (MFP), the relative contributions of surface/grain boundary scattering to the resistivity remain indefinitive. In this work, series of NiFe films sandwiched by A1N barriers were employed to study the transport properties. Surface scattering is found to provide the strongest contribution to the resistivity increase for very thin films (d_(NiFe) ≤10nm). With the increase of the film thickness, the effect of the grain boundary scattering gradually increases while the surface scattering decreases. When the thickness of the film is over 30 nm, the former becomes predominant.
机译:当膜厚度接近电子平均自由程(MFP)时,表面/晶粒边界散射对电阻率的相对贡献仍然不确定。在这项工作中,一系列被AlN势垒夹在中间的NiFe薄膜被用来研究传输性能。对于非常薄的薄膜(d_(NiFe)≤10nm),发现表面散射对电阻率增加的贡献最大。随着膜厚的增加,晶界散射的影响逐渐增加,而表面散射减小。当膜的厚度超过30nm时,前者占主导。

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  • 来源
    《Applied Surface Science》 |2014年第1期|70-74|共5页
  • 作者单位

    Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China;

    Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China;

    Analytical and Testing Center, Beijing Normal University, Beijing 100875, China;

    Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China;

    Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China;

    School of Materials and Chemical Engineering, Hainan University, Haikou 570228, China;

    Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China;

    Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China;

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

    Spin electrons transport; NiFe/AlN interface; Grain boundary scattering; Surface scattering;

    机译:自旋电子传输;NiFe / AlN接口;晶界散射;表面散射;

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