(color online) (a) and (b) Field dependence of resistance at fixed temperatures below T_c, for Rb₂Cr₃As₃ crystals with and , respectively. Panel (c) shows an additional data set for another crystal with . Panel (d) summarizes the result in Rb₂Cr₃As₃, using as the horizontal axis. The Pauli paramagnetic limit is marked. The inset plots the anisotropic parameter in a logarithmic scale (adapted from Ref. [54]).