Uniaxial ferromagnetism in the vanadium-based kagome metal TbV6Sn6

Vanadium-based kagome metals RV6Sn6 (R=rare earth) are appealing candidates for exploring the interplay between R-site magnetism and nontrivial band topology associated with the nonmagnetic vanadium-based kagome network. Here we present the synthesis and characterization of TbV6Sn6 via single crystal X-ray diffraction, magnetization, transport, and heat capacity measurements. Magnetization measurements reveal strong, uniaxial magnetic anisotropy rooted in the alignment of Tb3+ moments in the interplane direction below 4.3(2) K. TbV6Sn6 exhibits multiband transport behavior with high mobilities of charge carriers, and our measurements suggest TbV6Sn6 is a promising candidate for hosting Chern gaps driven via the interplay between strong spin-orbit coupling, Tb-site magnetic order and the band topology of the V-site kagome network.