Thermoelectric effects in Kagome Magnet TmMn₆Sn_6-xGa_x

Kagome magnets RMn₆Sn₆ (R = rare earth elements), where the Mn atoms form the Kagome layer, host distinct nontrivial electronic states and rich magnetic textures. Thermoelectric measurements have been a powerful tool to probe novel quantum states in these materials. In this study, we report the Nernst effect measurements in Ga-doped Kagome magnet series TmMn₆Sn_6-xGa_x, where x = 2.8 and 4.5. We observed an Anomalous Nernst effect, along with a strong exchange-biased behavior reflected by asymmetric hysteresis loops, suggesting the coexistence of multiple magnetic orders in the system. We also explore the influence of Ga-doping levels on the thermoelectric properties of these compounds.