Thickening of YBa2Cu3Oy-coated Conductors Fabricated by Self-heating Technique Using Pulsed Laser Deposition Method and Superconducting Properties in Magnetic Field

Abstract

Synopsis : We fabricated YBa 2 Cu 3 O y (YBCO)coated conductors (CCs) 0.4 - 8.6 μ m in thickness on Hastelloy metal substrates with oxide-textured layers, including IBAD-MgO, which were heated by a self-heating technique (SHT) using the pulsed laser deposition method. The substrate temperature ( T s ) measured with a thermocouple or pyrometer was feedback-controlled (FBC) during deposition. It was possible to suppress a-axis grains even in a thick when using the SHT. The critical current ( I c ) of the YBCO CCs with a thickness of 4.9 μ m reached 1080 A/cm-w at 77 K and in a self-field. In addition, 3.0 - 9.0 vol.%BHO-doped YBCO CCs with a thickness of 3.0 μ m were fabricated using pyrometer FBC. The I c in a magnetic field at 77 K was optimized by adding 3.0 vol.%BHO.