In this study,a simple template consisted of Y2O3 and La2Zr2O7 (LZO) layers was fabricated on rolling assisted biaxially textured Ni-5at%W substrates for YBa2Cu3O7-δ (YBCO) coated conductors.A thin sputtered Y2O3 layer (～20 nm) was introduced as a seed layer in order to induce epitaxial growth of metal organic deposited LZO layer.The effects of Y2O3 layer,annealing temperature and dwelling time on the phase and texture of the LZO films were systematically investigated.X-ray diffraction exhibited that the LZO films were purely c-axis-oriented with full width at half maximum value of out-of-plane and in-plane less than 4° and 6° respectively.Atomic force microscope analysis indicated the surface of such films was smooth,dense and crack-free.1.2μm-thick YBCO films were prepared directly on this 2-layer template with a critical current density of 0.58 MA/cm2 at 77 K and self field and Ic value of 70 A/cm-width,indicating a combination of LZO/Y2O3 is a promising buffer architecture for low cost production of high performance coated conductors.
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