Influence of Fe Buffer Layer on Co-Doped BaFe₂As₂ Superconducting Thin Films

Figure 4

Normalized transient reflectivity of Ba-122/CaF₂, Ba-122/Fe/MgO, and Fe/MgO thin films at 300 K (a) and 20 K (b); (c) the divergence-like behaviour for the two thin films. The solid lines represent the best fit of (1); inset: versus temperature for the same two films.

(a)

(b)

(c)