Epitaxial Films and Superstructures

FIGURE 2. (a) Out-of-plane and (b) in-plane XRD patterns of CajCoOi epitaxial films after annealing with Ca(OH)2 powder at each temperature (Fa = 25°C (as-prepared), 300°C, and 700°C) in air. Arrows indicate the superstructure peaks fl-om the Ca-ordered structures. 

Fig. 76. (i) RHEED pattern of [1010] direction of an epitaxial Y (0001) film taken at 20 kV. (ii) The corresponding RHEED pattern of the sample films after deposition of 5 nm of Pd over layer at 300 °C. The superstructure peaks indicates an ordered Pd-Y alloy whereas the V form of the streaks indicate facetted surface, (iii) The RHEED pattern after depositing 0.5 nm (left pattern) and 5 nm of Pd at RT. The original Y reflexes are observed to vanish immediately after deposition of 0.5 nm of Pd and an amorphous/polycrystalline overlayer is formed (Borgschulte et al., 2001). 

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