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首页> 外文期刊>Physical review >Out-of-plane spin-orientation dependent magnetotransport properties in the anisotropic helimagnet Cr_(1/3)NbS_2
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Out-of-plane spin-orientation dependent magnetotransport properties in the anisotropic helimagnet Cr_(1/3)NbS_2

机译:各向异性直升机磁铁Cr_(1/3)NbS_2的面外自旋取向相关的磁输运性质

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摘要

Understanding the role of spin-orbit coupling (SOC) has been crucial for controlling magnetic anisotropy in magnetic multilayer films. It has been shown that electronic structure can be altered via interface SOC by varying the superlattice structure, resulting in spontaneous magnetization perpendicular or parallel to the plane. In lieu of magnetic thin films, we study the similarly anisotropic helimagnet Cr_(1/3)NbS_2 where the spin-polarization direction, controlled by the applied magnetic field, can modify the electronic structure. As a result, the direction of spin polarization can modulate the density of states and in turn affect the in-plane electrical conductivity. In Cr_(1/3)NbS_2, we found an enhancement of in-plane conductivity when the spin polarization is out-of-plane as compared to in-plane spin polarization. This is consistent with the increase in density of states near the Fermi energy at the same spin configuration, found from first-principles calculations. We also observe unusual field dependence of the Hall signal in the same temperature range. This is unlikely to originate from the noncollinear spin texture but rather further indicates strong dependence of electronic structure on spin orientation relative to the plane.
机译:理解自旋轨道耦合(SOC)的作用对于控制磁性多层膜中的磁各向异性至关重要。已经表明,可以通过改变超晶格结构而通过界面SOC来改变电子结构,从而导致垂直于或平行于该平面的自发磁化。代替磁性薄膜,我们研究了类似的各向异性直升机磁铁Cr_(1/3)NbS_2,其中受外加磁场控制的自旋极化方向可以改变电子结构。结果,自旋极化的方向可以调节状态的密度,进而影响面内电导率。在Cr_(1/3)NbS_2中,我们发现自旋极化与面外自旋极化相比,平面内电导率有所提高。这与从第一性原理计算中得出的相同自旋构型下费米能量附近的态密度增加是一致的。我们还观察到了在相同温度范围内霍尔信号的异常场依赖性。这不太可能源自非共线自旋纹理,而是进一步表明电子结构对相对于平面的自旋取向的强烈依赖性。

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  • 来源
    《Physical review》 |2015年第18期|184401.1-184401.6|共6页
  • 作者单位

    Department of Physics, University of Colorado, Boulder, Colorado 80309, USA;

    Department of Physics, University of Colorado, Boulder, Colorado 80309, USA;

    Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA,Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA,Los Alamos National Laboratory, Los Alamos, New Mexico;

    Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA,Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA,Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, USA;

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;

    Department of Physics, University of Colorado, Boulder, Colorado 80309, USA;

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

    magnetic anisotropy; electron density of states and band structure of crystalline solids;

    机译:磁各向异性态固体的电子密度和能带结构;

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