Article ID Journal Published Year Pages File Type
1665855 Thin Solid Films 2013 4 Pages PDF
Abstract

•A direct sintering process eliminated preceding calcination steps•Highly c-axis YBa2Cu3O7 − δ films were grown on SrTiO3 substrates.•Examination of the influence of the heating ramp in this direct sintering process•Superconductivity observed in a broad range of heating ramps•A fast and easy, industrially attractive sintering process is obtained.

YBa2Cu3O7 − δ films were produced on (00l) SrTiO3 single crystal substrates by a sustainable fluorine-free chemical solution deposition method. Using water as the primary solvent and low-cost precursors, a direct sintering process without calcination could be obtained. Variation of the heating rate towards the sintering temperature showed a strong effect on texture, surface morphology, phase purity and concurrent superconducting properties. Using an optimized heating rate of 5 °C min− 1, superconducting films were produced with an onset critical temperature of 92 K, a difference in critical temperature during transition of 1.8 K, a critical current density of 1.1 MA cm− 2 and a critical current of 50 A cm− 1 width at 77 K and self-field.

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Physical Sciences and Engineering Materials Science Nanotechnology
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