阻挫磁体TmB_4的磁滞磁电阻和非常规反常霍尔效应
Hysteretic magnetoresistance and unconventional anomalous Hall effect in the frustrated magnet TmB_4
摘要：
我们通过磁化和输运实验研究了阿基米德Shastry-Sutherland晶格上的阻挫磁体TmB_4。TmB_4的电阻率无各向异性，表明它是一个电子三维系统。磁阻（MR）在低温下是滞后的，即使相应的磁化滞后是缺席。霍尔电阻率显示出非常规的异常霍尔效应（AHE），是线性的饱和以上，尽管一个大的MR。我们建议，复杂的结构在磁畴壁可能是负责滞后MR，也可能导致AHE。
英文摘要：
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 TmB_4 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.
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