2026-04-17T15:41:03Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/117932024-06-18T11:49:10Zcom_2072_452955com_2072_2054col_2072_453063

00925njm 22002777a 4500 dc Palmer, X. author Pop, Cornelia author Eloussifi, Hichem author Roura Grabulosa, Pere author Farjas Silva, Jordi author Calleja, Albert author Palau, Anna author Obradors, Xavier author Puig Molina, Teresa author Ricart, Susagna author 2016 We present our work in the preparation of metallorganic precursor solutions with reduced fluorine content, able to fulfil the requirements for high-performance superconducting YBCO epitaxial layers as a promising approach to low cost and scalable coated conductors. Six different solutions using different quantities of fluorine and non-fluorine carboxylate precursors with a total amount of fluorine from 10 to 50% that of standard trifluoroacetic acid (TFA) solutions. For stabilization purposes different coordinating agents have been used and the solution rheology has been modified for proper substrate wettability. Thermal decomposition analysis and infrared spectroscopy performed directly in films, have revealed that the decomposition takes place in two consecutive stages around 265 and 310 °C respectively, and nuclear magnetic resonance (NMR) analysis could unveil the chemical reactions taking place in the solution. Using the solutions with 20% fluorine and upon optimization of the growth process parameters, YBCO layers with T c and J c(77 K) of 90 K and 4 MA cm−2 are obtained The authors acknowledge the financial support from MICINN (Consolider NANOSELECT, CSD2007-00041, MAT 2011-28874-C02, MAT2014-51778-C2-2-R); Generalitat de Catalunya (Pla de Recerca 2014-SGR-753 and XaRMAE), and EU (FP7 NMP-LA-2012-280432 EUROTAPES project and MP1201 Cost action) http://hdl.handle.net/10256/11793 Thin films Capes fines Espectrometria de masses Mass spectrometry Anàlisi tèrmica Thermal analysis Solution design for low-fluorine trifluoroacetate route to YBa2Cu3O7 films