A simple MOD method to grow a single buffer layer of Ce0.8Gd0.2O1.9 (CGO) for coated conductors |
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Authors: | Min Liu Dongqi Shi Hongli Suo Shuai Ye Yue Zhao Yonghua Zhu Qi Li Lin Wang Ahn Jihyun Meiling Zhou |
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Institution: | 1. Institute for Superconducting and Electronic Materials, University of Wollongong, NSW 2522, Australia;2. The Key Laboratory of Advanced Functional Materials, Ministry of Education, The College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China |
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Abstract: | A single Ce0.8Gd0.2O1.9 (CGO) buffer layer was successfully grown on the home-made textured Ni–5 at.%W (Ni–5W) substrates for YBCO coated conductors by a simple metal–organic deposition (MOD) technique. The precursor solution was prepared using a newly developed process and only contained common metal–organic salts of both Ce and Gd dissolved into a propionic acid solvent. The precursor solution at 0.4 M concentration was spin coated on short samples of Ni–5W substrates and heat-treated at 1100 °C in a mixture gas of 5% H2 in Ar for an hour. X-ray studies indicated that the CGO films had good out-of-plane and in-plane textures with full-width-half-maximum values of 4.18° and 6.19°, respectively. Atomic force microscope (AFM) investigations of the CGO films revealed that most of the grain boundary grooves on the Ni–5W surface were found to be well covered by CGO layers, which had a fairly dense and smooth microstructure without cracks and porosity. These results indicate that our MOD technique is very promising for further development of single buffer layer architecture for YBCO coated conductors, due to its low cost and simple process. |
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