Figure 4

(a) Temperature dependence of field-cooled (FC) and zero-field-cooled (ZFC) magnetization for the PrFeAsO0.60F0.12 sample under different applied pressures up to 1.1 GPa. The downward arrow is to show the increase of Meissner signal with applied pressure. (b) The enlarged view of the ZFC magnetization curves in the vicinity of superconducting transition. The small vertical downward arrow indicates the \({T}_{c}^{on}\) at ambient pressure. The horizontal arrow represents the shifting of \({T}_{c}^{on}\) towards higher temperature with increasing pressure. (c) The downward arrow indicates the increase in Meissner signal with increasing pressure in FC magnetization measurement.