Influence of Lattice Mismatch in Preparation of the SmBiO3 Buffer Layer by a CSD Method

SmBiO
₃
(SBO) buffer layers have been prepared via a rapid chemical solution deposition (CSD) method on different substrates, such as LaAlO
₃
(LAO), yttrium-stabilized zirconium (YSZ), and NiO-buffered NiW (NiO/NiW). The SBO buffer layers deposited on LAO, YSZ, and NiO/NiW substrates have strong SBO (200) peaks and smooth surface. The SBO buffer layer is difficult to grow on the MgO substrate. The lattice mismatches between SBO buffer layers and different substrates have great influence on the epitaxial films quality. With the increase in lattice mismatch, the optimum texture temperature ranges become narrower, also the texture degrees of SBO epitaxial films decrease, and the SBO buffer layers become rougher.