Low-temperature liquid-phase epitaxy of YBa₂Cu₃O_y films by the molten KOH method

Abstract

We fabricated high-performance YBa2Cu3O y (Y123) films by the liquid-phase epitaxy method using molten KOH flux at low temperatures. The Y123 films fabricated in N2 atmosphere showed biaxial orientation above 500 °C; moreover, the surface morphology of the Y123 films fabricated above 650 °C suggested spiral growth. The Y123 films fabricated above 650 °C showed a sharp transition with a of 90 K.