Anomalous Hall effect in kagome ferromagnet YbMn6Sn6 single crystal

The rare-earth based magnetic kagome materials RMn ₆Sn ₆ have attracted tremendous interest for their potential to host exotic topological quantum states. Here, we report the observation of the anomalous Hall effect in the kagome ferromagnet YbMn ₆Sn ₆ single crystal. YbMn ₆Sn ₆ has an easy-plane ferromagnetic structure till 2 K without magnetic ordering of the R ions. The low-temperature magnetoresistance is positive and does not exhibit a tendency to saturate up to 5 T. The magnetoresistance becomes negative with the increasing temperature. An intrinsic anomalous Hall conductivity with the value of 40.2 Ω ⁻¹·cm ⁻¹ is obtained in YbMn ₆Sn ₆, which is associated with the Berry curvature of electronic band structure in momentum space. Our results indicate that YbMn ₆Sn ₆ may be an excellent platform to study the relationship between the magnetic and electronic structure and to explore novel quantum phenomenon.