Figure 6: Calculated temperature dependence of the penetration depth () for LaFeAsOF ( K, red solid line), BaKFeAs ( K, dash blue line), and for SmFeAsOF ( K, green dash-dot line). The insert shows the behaviour of obtained by solution of Eliashberg equations: red circles for LaFeAsOF, dark blue triangle for BaKFeAs, green squares for SmFeAsOF. The lines are the third-order polynomial fits.