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Hysteretic magnetoresistance and unconventional anomalous Hall effect in the frustrated magnet TmB_4

机译：失磁磁体TmB_4中的磁滞磁阻和非常规异常霍尔效应

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摘要

We study TmB_4, a frustrated magnet on the Archimedean Shastry-Sutherland lattice, through magnetization and transport experiments. The lack of anisotropy in resistivity shows that TmB4 is an electronically three-dimensional system. The magnetoresistance (MR) is hysteretic at low temperature even though a corresponding hysteresis in magnetization is absent. The Hall resistivity shows unconventional anomalous Hall effect (AHE) and is linear above saturation despite a large MR. We propose that complex structures at magnetic domain walls may be responsible for the hysteretic MR and may also lead to the AHE.
机译：我们通过磁化和输运实验研究了阿基米德沙斯特-萨瑟兰晶格上的失磁磁体TmB_4。电阻率缺乏各向异性表明TmB4是电子三维系统。即使在磁化中没有相应的磁滞，磁阻（MR）在低温下也是磁滞的。霍尔电阻率显示出非常规的异常霍尔效应（AHE），尽管MR大，但在饱和以上仍呈线性。我们建议磁畴壁处的复杂结构可能导致磁滞MR，也可能导致AHE。

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  • 来源
    《Physical review》 |2016年第17期|174408.1-174408.5|共5页
  • 作者

    Sai Swaroop Sunku; Tai Kong; Toshimitsu Ito; Paul C. Canfield; B. Sriram Shastry; Pinaki Sengupta; Christos Panagopoulos;

  • 作者单位

    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link 637371, Singapore;

    Ames Laboratory, U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8562, Japan;

    Ames Laboratory, U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    Physics Department, University of California, Santa Cruz, California 95064, USA;

    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link 637371, Singapore;

    Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link 637371, Singapore;

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