Top panels: magnetic field structure functions S_B, p (log-scale) of sim.1 at (a) and of sim.2 at (b); dashed straight lines represent the power laws r^p, and vertical dash-dotted lines delimit ranges I and II. Middle panels: S_B, 4 vs. S_B, 2 (filled black dots, in log-scale) for r <  10 d_i from sim.1 at (c) and sim.2 at (d); ranges I and II were fit separately with straight lines (blue and red lines, respectively); vertical dash-dotted lines separate range I from range II. Bottom panels: magnetic field scaling exponents β_B(p, 1) within range I (blue) and range II (red) from sim.1 at (e) and sim.2 at (f); the dashed straight line, representing the self-similar scaling β(p, 1) = p, is given as reference.