Comparison of the magnetic field topology between our reference model (P_⋆ = 4 days, black) and two stars with P_⋆ = 5 days (blue) and P_⋆ = 6 days (orange). The vertical dashed lines mark the positions of R_cor and are colour-coded accordingly. Panels (a) and (b) show the vertical and radial magnetic field profiles in the inner and outer disk, respectively. Panels (c) and (d) depict the conductivity-weighted, vertically averaged resistivity $\overline{\overline{\eta }}$, whereas panels (e) and (f) describe the ratio B_r^s/B_z. The scale on the right-hand side of (c) and (d) denotes the angle of the magnetic field lines to the midplane normal, which corresponds to tan⁻¹(B_r^s/B_z). The dashed horizontal line marks a surface angle of 30°, which is an indicator for efficient MHD winds (see text).