Abstract
We have prepared c-axis oriented Nd1+xBa2-xCu3Oy (Nd123) films onto MgO (100) single-crystal substrates by the liquid phase epitaxy (LPE) technique under two different modes of supersaturation. The superconducting transition temperature T C of the films grown in the step-cooling mode is reached to 93 K, whereas that of the films grown in the transient mode LPE is limited up to 83 K. The less easy accommodation of oxygen uptake but resulting better superconducting properties in the step-cooling film can be explained in terms of the compositionally well-ordered structure with less density of imperfections.
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