标题： 通过霍尔效应探索LaCrGe3中两种铁磁态和方向极性的特征 显示英文标题

标题： Exploring the signature of two ferromagnetic states and goniopolarity in LaCrGe3 through Hall effect

摘要： LaCrGe3已成为理解铁磁（FM）材料中量子临界现象的平台。 由于其独特的两个铁磁相，它也引起了关注。 在这里，我们利用霍尔效应证明了这些相的存在。 在固定磁场下进行连续温度依赖的霍尔电阻率测量清楚地表明，无论施加的磁场方向如何，这些相都存在。 在两个相之间的边界处，剩余霍尔电阻率和霍尔系数分别达到最大值和最小值。 当磁场沿磁易轴方向施加时，在2 K时观察到显著大的反常霍尔电导率1160 ohm-1cm-1，这主要由内在效应主导，至少在低温FM相中是这样。 在顺磁（PM）相中，六方LaCrGe3在不同的晶体学方向上表现出相反的载流子极性，这是由于各向异性费米面几何结构引起的，这种现象称为“方位极性”。 方位极性输运和非常规磁相的共存可能使该材料成为未来电子器件的有前途的候选材料。 显示英文摘要

摘要： LaCrGe3 has become a playground to understand quantum critical phenomena in ferromagnetic (FM) materials. It has also garnered attention due to its peculiar two FM phases. Here, we demonstrate the presence of these phases using the Hall effect. Continuous temperature-dependent Hall resistivity measurements at fixed magnetic fields clearly demonstrate the presence of these phases, regardless of the direction of the applied magnetic field. The remanent Hall resistivity and Hall coefficient undergo a maximum and a minimum, respectively, at the boundary between the two phases. We observe significantly large anomalous Hall conductivity of 1160 ohm-1cm-1 at 2 K when the magnetic field is applied along the magnetic easy axis, which is dominated by intrinsic effects, at least in the low-temperature FM phase. In the paramagnetic (PM) phase, hexagonal LaCrGe3 exhibits opposite charge carrier polarities along different crystallographic directions, attributed to the anisotropic Fermi surface geometry, a phenomenon known as "goniopolarity". The coexistence of goniopolar transport and unconventional magnetic phases may lead this material as a promising candidate for future electronic devices.