Electronic and magnetic properties of intermetallic kagome magnets RV6Sn6(R=Tb−Tm)

We present a systematic study of the structure, electronic, and magnetic properties of a new branch of intermetallic compounds, $R{\mathrm{V}}_{6}{\mathrm{Sn}}_{6}(R=\mathrm{Tb}\text{\ensuremath{-}}\mathrm{Tm})$ by using x-ray diffraction, magnetic susceptibility, magnetization, electrical transport, and heat-capacity measurements. These compounds feature a combination of a nonmagnetic vanadium kagome sublattice and a magnetic rare-earth triangular sublattice that supports various spin anisotropies based on different $R$ ions. We find magnetic orders for the $R$ = Tb, Dy, and Ho compounds at 4.4, 3, and 2.5 K, respectively, while no ordering is detected down to 0.4 K for the $R$ = Er and Tm compounds with easy-plane anisotropies. Electronically, we found no superconductivity or charge ordering transition down to 0.4 K for any member of this family, while all compounds exhibit multiband transport properties.