Figure 1
Temperature and width of the superconducting transition, from rough data. The inset shows the temperature dependence of the inverse of the resonator quality factor in the presence of the Ba1−x K x Fe2As2 sample, normalized to its value at T = 40 K. Data are shown for the same crystal before and after subsequent irradiations. In the mainframe, derivatives are reported, showing that irradiations cause T c suppression and transition-width enlargement.
