Preparation of YBa₂Cu₃O_7-y High T_c Thin Films on NdGaO₃ Substrate by Laser Ablation

As-grown thin films of YBa₂Cu₃O_7-y with a smooth surface were obtained on lattice-matched NdGaO₃ substrates by ArF laser ablation deposition. The as-grown thin film has a zero-resistance temperature (T_c) at 90 K. The full width at half-maximum (FWHM) of the X-ray diffraction peak (005) of the thin film was as narrow as 0.12 degrees. These results suggest that the as-grown YBa₂Cu₃O_7-y films on NdGaO₃ substrates were high-quality single crystals. NdGaO₃ substrates are thought to be a promising substrate for epitaxial growth of YBa₂Cu₃O_7-y high T_c thin films.