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Rare-earth mixed oxide thin films as 100% lattice match buffer layers for YBa2Cu3O7−x coated conductors
- Source :
-
Thin Solid Films . Apr2010, Vol. 518 Issue 12, p3345-3350. 6p. - Publication Year :
- 2010
-
Abstract
- Abstract: Buffer layers with 100% lattice match with YBa2Cu3O7 − δ (YBCO) were prepared from mixed rare-earth-oxides applying a simple sol–gel process and dip-coating method. Structural analysis of the sol–gel derived powder by X-ray diffraction revealed that the mixing parameter, which eliminates the lattice mismatch with YBCO, is x =0.2382, 0.1852, 0.1252, 0.0906, 0.0793 and 0.0395 in (Eu1 − x Ho x )2O3, (Eu1 − x Er x )2O3, (Eu1 − x Yb x )2O3, (Gd1 − x Ho x )2O3, (Gd1 − x Y x )2O3 and (Gd1 − x Yb x )2O3, respectively. Microstructural investigations were carried out for Gd1.819Ho0.181O3 films epitaxially grown on cube-textured Ni (100) substrates by sol–gel dip-coating process. X-ray diffraction of the buffer showed strong out-of-plane orientation on Ni tape. The (Gd1 − x Ho x )2O3 (222) pole figure indicated a single cube-on-cube textured structure. The omega and phi scans revealed good out-of-plane and in-plane alignments. The full-width at half-maximum values of omega and phi scan of (Gd1 − x Ho x )2O3 films was observed at 4.21° and 6.81°, respectively. Micrographs of the film obtained by using environmental scanning electron microscope and atomic force microscope revealed pinhole-free, crack-free, smooth and dense microstructures. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00406090
- Volume :
- 518
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Thin Solid Films
- Publication Type :
- Academic Journal
- Accession number :
- 48602462
- Full Text :
- https://doi.org/10.1016/j.tsf.2010.01.002