La 2 Zr 2−x Ce x O 7 prepared by chemical solution deposition on Ni–5%W: A promising buffer layer for YBCO-coated conductors

H. Muguerra (1) , A.-C. Pescheux , J.-L. Soubeyroux (2)

1 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
2 NEEL - MagSup - Magnétisme et Supraconductivité

La2Zr2−xCexO7 buffer layers are synthesized by chemical solution deposition on Ni–5%W RABIT substrate. Their structure and microstructure are examined as a function of cerium ratio by x-ray diffraction, atomic force microscopy and electron backscattering diffraction techniques. The composition La2Zr1.9Ce0.1O7 is a very promising candidate as buffer layer for coated conductor tapes. Indeed this Ce-doped layer shows a lower structural mismatch with YBa2Cu3O7−δ, a better texture quality and a smother surface than the classic La2Zr2O7 buffer layer. As a conclusion, this layer presents a high potential to yield a high Jc value in YBa2Cu3O7−δ tapes.

Mots clés: Chemical solution deposition; Oxide buffer layer; Thin films; Epitaxial growth; Coated conductor; Superconductors

Domaines: Physique [physics]

H. Muguerra, A.-C. Pescheux, J.-L. Soubeyroux. La 2 Zr 2−x Ce x O 7 prepared by chemical solution deposition on Ni–5%W: A promising buffer layer for YBCO-coated conductors. Materials Letters, 2016, 163, pp.192 - 195. ⟨10.1016/j.matlet.2015.10.089⟩. ⟨hal-01902099⟩