We report on the growth of epitaxial YBa2Cu3O7 thin films on X-cut LiNbO3 single crystals. The use of double CeO2/YSZ buffer layers allows a single in-plane orientation of YBa2Cu3O7, and results in superior superconducting properties. In particular, surface resistance Rs values of 1.4 m have been measured at 8 GHz and 65 K. The attainment of such low values of Rs constitutes a key step toward the incorporation of high Tc materials as electrodes in photonic and acoustic devices.
Fabrega, L.; Rubi, R.; Fontcuberta, J.; Sanchez, F.; Ferrater, C.; Garcia-Cuenca, M. V.; Varela, M.; Collado, C.; Mateu, J.; Menendez, O.; O'Callaghan, J. M. Reduced microwave losses YBa[sub 2]Cu[sub 3]O[sub 7 - delta] thin films on electro-optic LiNbO[sub 3] crystals. Journal of applied physics, 2002, vol. 92, núm. 10, p. 6346-6348.