Abstract
Epitaxial (100)/(001)-oriented PbTiO3 films with thickness of 2.8 μm were grown on Nb-doped (100) SrTiO3 substrates by pulsed metal organic chemical vapor deposition. Complex domain structures consisting of c -domains (c1) and three types of a -domains (a1, a2, and a3) were observed by piezoresponse force microscopy in conjunction with high-resolution x-ray diffraction analysis. The obtained results suggest that (a2/a3) and (a1/c1) domain configurations represent mostly strain-relaxed structures. This conclusion is in good agreement with theoretical predictions made for thick films [Phys. State., Solidi 37, 329 (1976)].
| Original language | English |
|---|---|
| Article number | 064121 |
| Journal | Journal of Applied Physics |
| Volume | 104 |
| Issue number | 6 |
| DOIs | |
| State | Published - 2008 |
| Externally published | Yes |
Funding
Work at Argonne was supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. FIG. 1. (a) Vertical PFM amplitude image of the PbTiO 3 film. (b) Magnified vertical PFM amplitude image of the area marked by the white circle in (a). (c) Lateral PFM amplitude image of the same area as in (b). (d) Sketch of crystal orientation of the SrTiO 3 substrate. (e) Cross-section profile of the vertical PFM signal across the line R - S in (a). (e) Cross-section profile of the vertical PFM signal along the line P - Q in (b). FIG. 2. Schematic of (a) the three-dimensional domain structure shown in Fig. 1 and [(b)–(d)] the different domain configurations based on the results shown in Fig. 1 . FIG. 3. ω - ψ scans of XRD pattern (a) out-of-plane 002 and (b) out-of-plane 200. (c) In-plane 200 along SrTiO 3 [100] and (d) in-plane 002 along SrTiO 3 [100]. FIG. 4. Schematic of the domains obtained by the results shown in Fig. 3(a) . C-2 spot and E-1 spot combination shown in Fig. 3(b) . C-3 spot and E-1 spot combination shown in Fig. 3(c) . A-4 spot and F-1 spot combination shown in Fig. 3(d) A-5 spot and F-1 spot combination shown in Fig. 3 . (e) B-3 spot and G-1 spot combination shown in Fig. 3(f) . B-3 spot and G-2 spot combination shown in Fig. 3(g) . B-3 spot and D-1 spot combination shown in Fig. 3(h) . B-3 spot and D-2 spot combination shown in Fig. 3 . FIG. 5. ω - ψ scans of XRD patterns of (a) out-of-plane 200, (b) in-plane 200 along SrTiO 3 [100], and (c) schematic of the possible domain combination. FIG. 6. [(a), (d), (g), and (j)] Projections of ω - ψ scans of XRD patterns overlapped by Figs. 3(a) and 3(b) . [(b), (c), (e), (f), (h), (i), (k), and (l)] schematic of the corresponding three-dimensional domain structures. Explanation is given in the text.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy | |
| Office of Science | |
| Basic Energy Sciences | |
| Argonne National Laboratory |