via Cr doping*

Materials containing kagome lattices have gained significant attention in part due to the coexistence of flat bands and Dirac points in their band structures which may become topologically non-trivial with the addition of spin-orbit coupling. The RT₆X₆ (R = rare earth, T = transition metal, X = Si, Ge, Sn) family is of particular interest due to the kagome layers being comprised solely of T. The ferrimagnet TbMn₆Sn₆ was recently claimed to be a quantum-limit Chern topological magnet [1], but the physics of this system is still being debated [2]. We present data on single crystals of Tb(Cr_xMn_1-x)₆Sn₆ showing that doping with largely non-magnetic Cr effectively tunes this system. The ferrimagnetic transition temperature and subsequent spin-reorientation temperature seen in TbMn₆Sn₆ both decrease with doping, the anomalous Hall effect is altered with doping, and a large coercivity is observed when the system is tuned to be nearly magnetically compensated. These responses provide evidence that doping can play a large role in engineering the magnetic and topological phases of the RT₆X₆ family.