Magnetic topological materials, which combine magnetism and topology, are expected to host emerging topological states and exotic quantum phenomena. In this study, with the aid of greatly enhanced coercive fields in high-quality nanoflakes of the magnetic Weyl semimetal Co₃Sn₂S₂, we investigate anomalous electronic transport properties that are difficult to reveal in bulk Co₃Sn₂S₂ or other magnetic materials. When the magnetization is antiparallel to the applied magnetic field, the low longitudinal resistance state occurs, which is in sharp contrast to the high resistance state for the parallel case. Meanwhile, an exceptional Hall component that can be up to three times larger than conventional anomalous Hall resistivity is also observed for transverse transport. These anomalous transport behaviors can be further understood by considering nonlinear magnetic textures and the chiral magnetic field associated with Weyl fermions, extending the longitudinal and transverse transport physics and providing novel degrees of freedom in the spintronic applications of emerging topological magnets.

结合磁性和拓扑学的磁性拓扑材料有望承载新兴的拓扑状态和奇异的量子现象。在这项研究中，借助磁性 Weyl 半金属 Co ₃ Sn ₂ S ₂的高质量纳米薄片中大大增强的矫顽场，我们研究了在块状 Co ₃ Sn ₂ S ₂中难以揭示的异常电子传输特性或其他磁性材料。当磁化强度与外加磁场反平行时，会出现低纵向电阻状态，这与并联情况下的高电阻状态形成鲜明对比。同时，还观察到了一个特殊的霍尔元件，它可以比传统的异常霍尔电阻率大三倍，用于横向传输。通过考虑非线性磁性结构和与外尔费米子相关的手征磁场，扩展纵向和横向传输物理并在新兴拓扑磁体的自旋电子应用中提供新的自由度，可以进一步理解这些异常传输行为。