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首页> 外文期刊>Japanese journal of applied physics >Hall resistivity and transverse magnetoresistivity generated in simultaneous presence of spin-polarized current and external magnetic field in a nonmagnetic bipolar conductor YH_2
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Hall resistivity and transverse magnetoresistivity generated in simultaneous presence of spin-polarized current and external magnetic field in a nonmagnetic bipolar conductor YH_2

机译：在非磁性双极导体YH_2中同时存在自旋极化电流和外部磁场时产生的霍尔电阻率和横向磁电阻率

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摘要

We have carried out magnetotransport measurements of the bipolar conductor YH_X (x ≃ 2) employing the ferromagnetic conductor Co as the source and drain electrodes, from which the spin-polarized currents are injected. Both the Hall resistivity (HR) and transverse magnetoresistivity (TMR) ratio are enhanced by a factor of ～3 and ～6, respectively, when Co electrodes are used instead of Au electrodes. We derived two types of closed formulae of HR and TMR, the first (second) type of which was derived by simultaneously (independently) considering the external magnetic field and spin-orbit interaction, but both types of which were derived by considering spin-dependent electrochemical potential caused by the presence of the ferromagnetic electrodes. Carrier parameter assessments based on the two types of formulae as well as the two types of electrode samples enable us to infer that coupling mechanisms between the external magnetic field and spin-orbit interaction are required for the precise interpretation of HR and TMR measured in the simultaneous presence of magnetic field and spin splitting in a diffusion force field, especially for conductors with strong spin-orbit interaction.
机译：我们已经使用铁磁导体Co作为源极和漏极对双极导体YH_X（x≃2）进行了磁传输测量，从中注入了自旋极化电流。当使用Co电极代替Au电极时，霍尔电阻率（HR）和横向磁阻率（TMR）分别提高了〜3和〜6倍。我们推导了HR和TMR的两种闭合公式，它们的第一（第二）种类型是通过同时（独立地）考虑外部磁场和自旋轨道相互作用来推导的，但是这两种类型都是通过考虑自旋相关性来推导的由铁磁电极的存在引起的电化学势。基于两种类型的公式以及两种类型的电极样品的载波参数评估使我们能够推断出，为了精确解释同时测量的HR和TMR，需要外部磁场与自旋轨道相互作用之间的耦合机制磁场的存在和扩散力场中的自旋分裂，特别是对于具有强烈自旋轨道相互作用的导体。

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  • 来源
    《Japanese journal of applied physics》 |2015年第1期|013001.1-013001.11|共11页
  • 作者

    Masamichi Sakai; Hiraku Takao; Tomoyoshi Matsunaga; Yusuke Tanaka; Tatsuya Arai; Shota Haruyama; Takashi Otomo; Hiroaki Hirama; Takahito Sakuraba; Zentaro Honda; Koji Higuchi; Akira Kitajima; Akihiro Oshima; Shigehiko Hasegawa; Hiroyuki Awano;

  • 作者单位

    Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan;

    Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan;

    Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan;

    Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan;

    Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan;

    Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan;

    Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan;

    Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan;

    Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan;

    Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan;

    The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan;

    The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan;

    The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan;

    The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan;

    Information Storage Materials Laboratory, Toyota Technological Institute, Nagoya 488-8511, Japan;

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