Abstract

A new processing schema is proposed to fasten the metal-organic decomposition step required to grow high critical current YBa2Cu3O7 thin films based on Trifluoroacetates (TFA). AFM and optical microscope study of quench samples at different temperatures have been performed to determine the temperature window where strong stresses are generated. The thickness evolution with the temperature has been observed and linked to the final microstructure. The influence of the gas flow and temperature annealing ramp for two different types of solution has been investigated. We demonstrate that high critical current YBa2Cu3O7 thin films, i.e. Jc = 3MA/cm2, with thickness of 300 nm can be grown with a new fast calcination process lasting only 60 min. This fastened calcination process allows to enhance the coated conductor production rate without the need of any modification of the metal-organic precursor solutions.

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