Table 1. Characteristics of the single crystal substrates used for this study.
| Substrate | Crystalline structure | Expected epitaxial relation | Lattice mismatch (%) | |
|---|---|---|---|---|
| NdGaO3 (110) | Orthorhombic perovskite a=5.43 Å c=5.50 Å | In-plane | SDC(1 0)||NGO(1 0) SDC(110)||NGO(001) |
0.64, 0.39 |
| Out-of-plane | SDC(001)||NGO(110) | |||
| LaAlO3 (001) | Pseudocubic perovskite a=3.82 Å | In-plane | SDC(110)||LAO(100) SDC(1 0)||LAO(010) |
−0.49, −0.49 |
| Out-of-plane | SDC(001)||LAO(001) | |||
| MgO (001) | face-centered cubic a=4.21 Å | None | ≈−29 | |
Expected epitaxial relations and lattice mismatch with 15 at.% Sm-doped CeO2 are displayed. The lattice mismatch, given in percent, is calculated as (asubstrate – aSDC)/asubstrate.


