Figure 2: Diamagnetic shift and the relaxation rate.

The temperature dependence of the diamagnetic shift ΔB_dia=μ₀[H_int,SC−H_int,NS] (a) and the muon spin relaxation rate σ_sc (b) for Ba_0.65Rb_0.35Fe₂As₂, measured in a magnetic field of μ₀H=50 mT. The dashed vertical lines denote T_c for p=0 and 2.22 GPa. The error bars represent the s.d. of the fit parameters.