Abstract

YbBa2Cu3O7-δ (Yb123) films were successfully prepared on SrTiO3 substrates by chemical solution deposition (CSD) under low oxygen partial pressure. The homogeneously coated films on SrTiO3(100) were calcined at 425°C by different heat-treatment profiles to decompose their organic components. These calcined films were fired at 750°C under 10−4 atm of oxygen partial pressure. The microstructures and the superconducting properties of final Yb123 films are highly dependent on the heat-treatment profiles of calcination. It has been confirmed by TEM and XPS measurements that the heat-treatment of rapid heating and quenching is essentially important in order to prepare the good amorphous precursor film for good superconducting properties.

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