Anomalous Hall effect and magnetic transition in the kagome material YbMn 6 Sn 6 .

We investigate the magnetic and transport properties of a kagome magnet YbMn 6 Sn 6 . We have grown YbMn 6 Sn 6 single crystals having a HfFe 6 Ge 6 type structure with ordered Yb and Sn atoms, which is different from the distorted structure previously reported. The single crystal undergoes a ferromagnetic phase transition around 300 K and a ferrimagnetic transition at approximately 30 K, and the magnetic transition at low temperature may be correlated to the ordered Yb sublattice. Negative magnetoresistance has been observed at high temperatures, while the positive magnetoresistance appears at 5 K when the current is oriented out of kagome plane. We observe a large anisotropic anomalous Hall effect with the intrinsic Hall contribution of 141 Ω -1 cm -1 forσzxintand 32 Ω -1 cm -1 forσxyint, respectively. These values are similar to those in YMn 6 Sn 6 with the same anisotropy. The magnetic transition and anomalous Hall behavior in YbMn 6 Sn 6 highlights the influence of the ordered Yb atoms and rare earth elements on its magnetic and transport properties.