ABSTRACT
CeO2 buffer layers have been deposited on YSZ single crystal substrates via a radio-frequency sputtering method. We focused on the texture development of CeO2 with out-of-plane alignment and its effects on a superconducting YBCO layer, which was deposited by metal organic deposition. CeO2 layers were grown epitaxially on single crystal YSZ substrates and subsequent YBCO layers were also grown epitaxially from CeO2 layers. It was observed that the intensity of CeO2(200) decreased with deposition temperature. θ-2θ scan FWHM values of CeO2(200) were inversely proportional to the peak intensities of CeO2(200). The sample with the lowest CeO2(200) intensity and poor out-of-plane alignment showed a strong reaction with the MODYBCO layer resulting in a thicker BaCeO3 layer. The texture and superconducting property of the YBCO layer were affected indirectly by the formation of a BaCeO3 layer at the interface between the CeO2 and YBCO layers.
keyword : CeO2, buffer Layer, epitaxial growth, grain alignment, MOD-YBCO, BaCeO3
