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Current-induced motion and pinning of domain walls in spin-valve nanowires studied by XMCD-PEEM

机译:XMCD-PEEM研究自旋阀纳米线中电流诱导的运动和畴壁的钉扎

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摘要

Very large average velocities, up to 600 m/s, have been found for domain-wall motion driven by 3-ns-long pulses of electric current in zero magnetic field in the NiFe layer of 200-nm-wide NiFe/Cu/Co nanowires. For longer pulses, the domain-wall motion is strongly hindered by pinning potentials. Dipolar interactions between the NiFe and Co layers caused by anisotropy inhomogeneities have been identified as the most important among the different potential sources of DW pinning. The domain-wall velocities increase with current density, but a substantial drop is observed at current densities above 4× 10~(11) A/m~2.
机译:对于200nm宽的NiFe / Cu / Co的NiFe层中的零磁场中由3ns长的电流脉冲驱动的畴壁运动,发现了非常大的平均速度,高达600 m / s纳米线。对于更长的脉冲,钉扎电位会严重阻碍畴壁运动。在DW钉扎的不同潜在来源中,由各向异性的不均匀性引起的NiFe和Co层之间的偶极相互作用已被确定为最重要的。畴壁速度随电流密度的增加而增加,但在高于4×10〜(11)A / m〜2的电流密度下观察到明显下降。

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  • 来源
    《Physical review》 |2010年第22期|P.224418.1-224418.10|共10页
  • 作者单位

    Institut Neel, CNRS and UJF, BP 166, 38042 Grenoble, France Institute of Physical Engineering, Brno University of Technology, 61669 Brno, Czech Republic;

    rnInstitut Neel, CNRS and UJF, BP 166, 38042 Grenoble, France;

    rnInstitut Neel, CNRS and UJF, BP 166, 38042 Grenoble, France;

    rnInstitute of Mathematical Engineering, Brno University of Technology, 61669 Brno, Czech Republic;

    rnUnite Mixte de Physique CNRS/Thales and Universite Paris Sud 11, 91767 Palaiseau, France;

    rnDepto. Fisica de la Materia Condensada and Inst. Nicolas Cabrera, Universidad Autonoma de Madrid, 28049 Madrid, Spain;

    rnPhyNano Team, Laboratoire de Photonique et de Nanostructures, CNRS, route de Nozay, 91460 Marcoussis, France;

    rnFachbereich Physik, Universitaet Konstanz, Universitaetsstr. 10, 78457 Konstanz, Germany;

    rnSynchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, 91192 Gif-sur-Yvette, France;

    rnEuropean Synchrotron Radiation Facility, BP 200, 38043 Grenoble, France;

    rnSynchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, 91192 Gif-sur-Yvette, France ELETTRA, Sincrotrone Trieste, Basovizza, 34012 Trieste, Italy;

    rnSynchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, 91192 Gif-sur-Yvette, France ELETTRA, Sincrotrone Trieste, Basovizza, 34012 Trieste, Italy;

    rnSynchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, 91192 Gif-sur-Yvette, France ELETTRA, Sincrotrone Trieste, Basovizza, 34012 Trieste, Italy;

    rnUnite Mixte de Physique CNRS/Thales and Universite Paris Sud 11, 91767 Palaiseau, France;

    rnUnite Mixte de Physique CNRS/Thales and Universite Paris Sud 11, 91767 Palaiseau, France;

    rnInstitut Neel, CNRS and UJF, BP 166, 38042 Grenoble, France;

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

    domain walls and domain structure; spin polarized transport in metals; magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields;

    机译:畴壁和畴结构;在金属中旋转极化传输;磁电子学自旋电子学:利用自旋极化传输或集成磁场的设备;

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