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首页> 外文期刊>Physical review >Spin-orbit coupling effect by minority interface resonance states in single-crystal magnetic tunnel junctions
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Spin-orbit coupling effect by minority interface resonance states in single-crystal magnetic tunnel junctions

机译：单晶磁性隧道结中少数界面共振态的自旋轨道耦合效应

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摘要

Spin-orbit coupling (SOC) related to the minority interface resonance states (IRSs) of Fe(001) has been evidenced in full-epitaxial Fe(001)/MgO/Fe magnetic tunnel junctions (MTJs) from magnetotransport experiments correlated to theoretical ab initio calculations. We show that the SOC effect strongly depends on the symmetry composition of the IRS, which has been skillfully engineered via the interfacial chemical structure in the Fe(001)/MgO stack. The SOC scattering is enhanced between the majority Δ_1 and minority Δ_5 band near the Fermi level when presenting a Δ_5 symmetry dominant IRS at the Fe/MgO interface. Our results validate the interplay between SOC and IRSs, which gives further understanding of the mechanisms responsible for the tunneling anisotropic magnetoresistance and the large perpendicular magnetic anisotropy at the Fe/MgO interface.
机译：与理论ab相关的磁传输实验已在全外延Fe（001）/ MgO / Fe磁性隧道结（MTJs）中证明了与Fe（001）的少数界面共振态（IRSs）相关的自旋轨道耦合（SOC）从头算。我们表明，SOC效应在很大程度上取决于IRS的对称成分，该成分已通过Fe（001）/ MgO堆中的界面化学结构进行了精心设计。当在Fe / MgO界面处出现Δ_5对称显性IRS时，在费米能级附近的多数Δ_1和少数Δ_5带之间，SOC散射增强。我们的研究结果验证了SOC和IRS之间的相互作用，从而使人们进一步了解了隧穿各向异性磁阻和Fe / MgO界面处的大垂直磁各向异性的机理。

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  • 来源
    《Physical review》 |2012年第18期|184420.1-184420.5|共5页
  • 作者

    Y. Lu; H.-X. Yang; C. Tiusan; M. Hehn; M. Chshiev; A. Duluard; B. Kierren; G. Lengaigne; D. Lacour; C. Bellouard; F. Montaigne;

  • 作者单位

    Institut Jean Lamour, UMR 7198, CNRS-Nancy Universite, BP 239, 54506 Vandoeuvre, France;

    SPINTEC, UMR 8191 CEA/CNRS/UJF-Grenoble 1/G-INP, 38054 Grenoble, France;

    Institut Jean Lamour, UMR 7198, CNRS-Nancy Universite, BP 239, 54506 Vandoeuvre, France,Centre for Superconductivity, Spintronics and Surface Science (C4S), Technical University of Cluj-Napoca, Str. Memorandumului nr. 28, 400114 Cluj-Napoca, Romania;

    Institut Jean Lamour, UMR 7198, CNRS-Nancy Universite, BP 239, 54506 Vandoeuvre, France;

    SPINTEC, UMR 8191 CEA/CNRS/UJF-Grenoble 1/G-INP, 38054 Grenoble, France;

    Institut Jean Lamour, UMR 7198, CNRS-Nancy Universite, BP 239, 54506 Vandoeuvre, France;

    Institut Jean Lamour, UMR 7198, CNRS-Nancy Universite, BP 239, 54506 Vandoeuvre, France;

    Institut Jean Lamour, UMR 7198, CNRS-Nancy Universite, BP 239, 54506 Vandoeuvre, France;

    Institut Jean Lamour, UMR 7198, CNRS-Nancy Universite, BP 239, 54506 Vandoeuvre, France;

    Institut Jean Lamour, UMR 7198, CNRS-Nancy Universite, BP 239, 54506 Vandoeuvre, France;

    Institut Jean Lamour, UMR 7198, CNRS-Nancy Universite, BP 239, 54506 Vandoeuvre, France;

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  • 正文语种 eng
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  • 关键词

    magnetotransport phenomena; materials for magnetotransport; spin-orbit coupling, zeeman and stark splitting, jahn-teller effect; tunneling; magnetic anisotropy;

    机译：磁传输现象;磁运输材料;自旋轨道耦合;塞曼和斯塔克分裂;詹恩-泰勒效应;隧道磁各向异性;

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