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首页> 外文期刊>Applied Physics Letters >Magnetotransport properties of dual MgO barrier magnetic tunnel junctions consisting of CoFeB/FeNiSiB/CoFeB free layers
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Magnetotransport properties of dual MgO barrier magnetic tunnel junctions consisting of CoFeB/FeNiSiB/CoFeB free layers

机译:CoFeB / FeNiSiB / CoFeB自由层组成的MgO势垒双磁性隧道结的磁输运性质

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摘要

We report the transport properties of a dual MgO barrier magnetic tunnel junction (DMTJ) where a FeNiSiB layer was inserted in a CoFeB free layer. Upon post-deposition annealing at 330 ℃, the tunneling magnetoresistance (TMR) ratio of the DMTJ with a hybrid CoFeB/FeNiSiB/CoFeB free layer reached 195% which is higher than the TMR ratio of 121% from the DMTJ with the single CoFeB free layer. The bias voltage dependence profile was more symmetric for the hybrid case. Boron depth profiling result suggests that the FeNiSiB layer dragged boron atoms more to it rather than letting them diffuse toward CoFeB/MgO interfaces, resulting in improved MTJ performances.
机译:我们报告了双重MgO势垒磁性隧道结(DMTJ)的传输特性,其中在FeFeSiB自由层中插入了FeNiSiB层。在330℃下进行沉积后退火后,具有无CoFeB / FeNiSiB / CoFeB混合层的DMTJ的隧穿磁阻(TMR)比达到195%,高于无CoFeB的DMTJ的TMR比121%。层。对于混合情况,偏置电压依赖性曲线更加对称。硼深度剖析结果表明,FeNiSiB层将硼原子更多地拖向了它,而不是让它们向CoFeB / MgO界面扩散,从而改善了MTJ性能。

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  • 来源
    《Applied Physics Letters》 |2012年第23期|232401.1-232401.4|共4页
  • 作者单位

    Department of Materials Science and Engineering, Korea University, Seoul 136-713, South Korea;

    Department of Materials Science and Engineering, Korea University, Seoul 136-713, South Korea;

    Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea;

    Korea Institute of Science and Technology, Seoul 136-791, South Korea;

    Department of Materials Science and Engineering, Korea University, Seoul 136-713, South Korea;

    Department of Electronic Engineering, Tohoku University, Sendai 980-8579, Japan;

    Department of Electronic Engineering, Tohoku University, Sendai 980-8579, Japan;

    Department of Materials Science and Engineering, Korea University, Seoul 136-713, South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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