  We report a robust anomalous Nernst effect in Co2MnGa thin films in the
thickness regime between 20 and 50 nm. The anomalous Nernst coefficient varied
in the range of -2.0 to -3.0 uV/K at 300 K. We demonstrate that the anomalous
Hall and Nernst coefficients exhibit similar behavior and fulfill the Mott
relation. We simultaneously measure all four transport coefficients of the
longitudinal resistivity, transversal resistivity, Seebeck coefficient, and
anomalous Nernst coefficient. We connect the values of the measured and
calculated Nernst conductivity by using the remaining three magneto-thermal
transport coefficients, where the Mott relation is still valid. The intrinsic
Berry curvature dominates the transport due to the relation between the
longitudinal and transversal transport. Therefore, we conclude that the Mott
relationship is applicable to describe the magneto-thermoelectric transport in
Weyl semimetal Co2MnGa as a function of film thickness.
