[16p-W9_325-1~10] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

1:45 PM - 2:00 PM JST(4:45 AM - 5:00 AM UTC)

[16p-W9_325-2] Investigation of In₂O₃:Sn Thin Films as Conductive Protective Layers for YBa₂Cu₃O₇ Superconducting Wires

Ryuki Motonaga¹, Haruki Yamamoto¹, Tsubasa Uchida¹, 〇Takumi Ikenoue¹, Toshiya Doi¹ (1.Kyoto Univ.)

Keywords:

YBa2Cu3O7,YBCO,Conductive Protective Layers

To achieve Ag-free REBa₂Cu₃O₇ (REBCO) superconducting wires, we investigated In₂O₃:Sn (ITO) as a conductive protective layer. ITO thin films were fabricated by pulsed laser deposition (PLD) on YBa₂Cu₃O₇ (YBCO) wires. In O₂ atmosphere, substrate temperatures above 150°C were required to achieve resistivity of 1.2-1.3×10^-2 Ωcm. However, subsequent oxygen annealing increased resistivity to 3.2-9.1×10^-2 Ωcm. To avoid this issue, ITO was deposited on pre-annealed YBCO wires in O₂ at 150 °C. Temperature dependence of magnetization confirmed that superconducting transition was maintained after ITO deposition. Effects of various deposition conditions on YBCO superconducting properties will be discussed.