Figure 1

Temperature dependence of resistivity, ρ, (a) and the real part of the zero-field-cooled ac susceptibility, χ′, at H = 3 Oe (b) for PrFeAsO_0.60F_0.12 sample near the superconducting transition at ambient pressure. Inset of (a) shows the ρ(T) curve of the sample from 2 to 300 K at zero applied pressure.