[9a-Z27-1~13] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

[9a-Z27-12] Evaluation of resistivity of a conductive buffer layer in a YBCO coated conductor using a textured copper tape

〇Toshiya Doi¹, Iwao Kawayama¹, Tsuyoshi Hamada¹, Seiya Inoue¹, Ataru Ichinose² (1.Kyoto Univ., 2.CRIEPI)

Keywords:superconductor, coated conductor, conductive buffer layer

We are developing a YBCO/conductive-buffer /Ni/Cu/SUS316 structure for a low cost high temperature superconducting wire. Recently, we applied La-doped SrTiO₃ as the conductive buffer layer, then epitaxially grew the YBCO layer on it. The resistivity in the thickness direction of the buffer in the YBCO/conductive-buffer /Ni/Cu/SUS316 short sample annealed at 450 ^oC in oxygen flowing, was measured. The resistivity of La-doped SrTiO₃ was 72 mW-cm at 77 K, which was a sufficiently low interfacial resistance of 7.6 mΩ-cm².