AC Losses in YBCO Coated Conductor with Inkjet Filaments

Abstract

To achieve low ac losses in applied ac fields, YBa2Cu3Ox (YBCO) filaments were created on a RABiTS buffered substrate through solution inkjet deposition. The metal organic decomposition (MOD) solution was placed into an inkjet nozzle and filaments of widths of 100 ?m and 0.8 mm were placed on the substrate at a spacing of 50 to 100 ?m. Each sample, which had a width of 1 cm and a nominal length of 4 cm, was placed in a perpendicular ac field and the ac losses were measured thermally as a function of the field strengths up to 100 mT and at frequencies between 60 Hz and 120 Hz. It was found that samples with inkjet filaments had a high degree of coupling loss. This coupling possibly extended between filaments along the sample length as removal of the conductor ends did not reduce the coupling loss contribution. Reduction in ac loss was observed in samples with laser-scribed filaments that were made from the same MOD solution.