Abstract
A series of Gd 2Zr 2O 7 (GZO) single buffer layers with different thicknesses were epitaxially grown on highly textured Ni–5 at.% W tapes using pulsed laser deposition. These allow the subsequent growth of high-quality superconducting YBa 2Cu 3O 7−δ layers. The superconducting transition temperature T c reaches a maximum value of 92.4 K as well as a narrow transition width of 0.8 K for the optimized GZO layer thickness. The inductive measurements show the critical current density as high as 1.2 MA/cm 2 at 77 K in self-field, indicating that a GZO single buffer layer is a suitable alternative for simplifying the second generation high T c superconducting coated conductors architecture.
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