Figure 2
(a) X-ray diffraction near the (0 0 2) Bragg peak in BFO films as a function of Δt with film thicknesses Z = 4 nm (top), 20 nm (center) and 35 nm (bottom), taken at a nominal laser fluence of 2.5 mJ cm−2. (b) Normalized broadening of the diffraction peak Δw and (c) average strain Δε for Z = 4 (green), 20 (blue) and 35 nm (red), with their corresponding peak value at Δt = 0 as a function of Z in the inserts. Solid lines are stretched exponential fits to the strain (see Fig. 4 caption). The intense feature at 15.2° in the top panel in (a) is the (0 0 2) Bragg peak from the STO substrate.
