Abstract
The YBa 2Cu 3O 7 films were prepared on polycrystalline {1 1 0}〈1 1 0〉 textured Ag substrates without any buffer layers using a MOD (metal organic deposition) method in various heat treatment condition. The Y:Ba:Cu cation ratio of the precursor solution was 1:2.6:4.5 molar ratio. The deficient of a Cu element was observed in the films prepared under a low oxygen partial pressure ( p(O 2)=0.0002 atm). The amount of Cu element was decreased with increasing the annealing temperature. From X-ray pole figure measurements, we confirmed a weak biaxial crystal orientation in the YBCO films prepared on a {1 1 0}〈1 1 0〉 textured polycrystalline Ag substrates at 900 °C for 2.5 h in air. On the polycrystalline {1 1 0}〈1 1 0〉 textured Ag substrates, the observed epitaxial relationship with YBCO lattice is 〈1 1 0〉 YBCO ∥ 〈1 1 0〉 Ag.
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