  Recently, kagome materials have become an engrossing platform to study the
interplay among symmetry, magnetism, topology, and electron correlation. The
latest works on RMn6Sn6 (R = rare earth metal) compounds have illustrated that
this family could be intriguing to investigate various physical phenomena due
to large spin-orbit coupling and strong magnetic ordering. However, combined
transport and spectroscopic studies in RMn6Sn6 materials are still limited.
Here, we report magnetic, magneto-transport, and angle-resolved photoemission
spectroscopy measurements of a kagome magnet ErMn6Sn6 that undergoes
antiferromagnetic (TN = 345 K) to ferrimagnetic (TC = 68 K) phase transitions
in the presence of field. We observe large anomalous and topological Hall
effects serving as transport signatures of the nontrivial Berry curvature. The
isothermal magnetization exhibits strong anisotropic nature and the topological
Hall effect of the compound depends on the critical field of metamagnetic
transition. Our spectroscopic results complemented by theoretical calculations
show the multi-orbital kagome fermiology. This work provides new insight into
the tunability and interplay of topology and magnetism in a kagome magnet.
