Sm-doped YBCO Coated Conductor on the IBAD MgO Template Fabricated by MOD Process

Abstract

Metal organic deposition (MOD) is one of the attractive processes for coated conductor applications because it is a non-vacuum cost-effective process. Many research groups have successfully fabricated high-J_C YBCO coated conductor on the RABiTS and IBAD-YSZ or GZO template with the MOD process. Reports on MOD-processed YBCO coated conductors prepared on the IBAD-MgO template, however, are hardly found. The precursor solution was coated on the CeO₂ capped IBAD-MgO template using the slot-die coating method, calcined at a temperature of 550^oC, and fired at high temperatures for 2 h 30 min in a reduced oxygen atmosphere. Optimal processing resulted in YBCO coated conductors exhibiting J_C value of 0.75 MA/cm² at 77 K in self-field. The J_C values of YBCO coated conductors were found very sensitive to their microstructure, critical temperature, and in-plane texture.