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Figure 7
Sketch of the supposed evolution of the crystallization for Sr-rich samples (EBE): (a) as-deposited amorphous layer with an Sr/Ti ratio of 1.9, (b) growth of SrTiO3 seed crystals, (c) an enlarged number of SrTiO3 crystallites accompanied by the first secondary phase, (d) and (e) appearance of alternative secondary phases, whereas the former phase vanishes, (f) presence of crystallites from cubic SrTiO3 only, and (g) separation into two distinctive layers comprising SrTiO3 and SrSiO3, respectively. The amorphous SiO2 layer thickness increases. All temperatures are exemplarily extracted from the sample with 2 K min−1 heating rate.

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