The ${\mathrm{NiBi}}_3$ compound exhibits a compelling interplay between superconductivity and magnetism, further enriched by topological characteristics that make it an exceptional platform for exploring emergent electronic phenomena. Here, we report experimental evidence of unconventional magnetic phenomena in high-quality single crystals of ${\mathrm{NiBi}}_3$, revealed through detailed magnetotransport measurements. The magnetoresistance increases with temperature, featuring two distinct behaviors, a classical ordinary component at high fields and a linear contribution at low magnetic fields. In addition, anomalous Hall effect signals persist down to the superconducting transition temperature and vanish at 150 K. These observations suggest that magnetic fluctuations play a significant role in charge transport in ${\mathrm{NiBi}}_3$, highlighting the influence of magnetic correlations and strong spin-orbit coupling in the electronic structure. Our findings underscore the complex and multifaceted nature of this material.

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• Anomalous Hall effect
• Transport phenomena
• Ultrafast magnetic effects
• Intermetallic compounds
• Magnetization measurements
• Resistivity measurements