  Topological magnetic semimetals promise large Berry curvature through the
distribution of the topological Weyl nodes or nodal lines and further novel
physics with exotic transport phenomena. We present a systematic study of the
structural and magnetotransport properties of Co$_2$MnGa films from thin (20
nm) to bulk like behavior (80 nm), in order to understand the underlying
mechanisms and the role on the topology. The magnetron sputtered Co$_2$MnGa
films are $L$$2_{\mathrm {1}}$-ordered showing very good heteroepitaxy and a
strain-induced tetragonal distortion. The anomalous Hall conductivity was found
to be maximum at a value of 1138 S/cm, with a corresponding anomalous Hall
angle of 13 %, which is comparatively larger than topologically trivial metals.
There is a good agreement between the theoretical calculations and the Hall
conductivity observed for the 80 nm film, which suggest that the effect is
intrinsic. Thus, the Co$_2$MnGa compound manifests as a promising material
towards topologically-driven spintronic applications.
