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Reduced microwave losses of YBa2Cu3O7_thin films on electro-optic LiNbO3 crystals Fàbrega, L. Rubí, R. Fontcuberta i Griñó, Josep Sánchez Barrera, Florencio Ferrater Martorell, Cèsar García-Cuenca Varona, María Victoria Varela Fernández, Manuel, 1956- Collado Gómez, Juan Carlos Mateu Mateu, Jordi Menéndez Nadal, Óscar O'Callaghan Castellà, Joan Microones Cristalls Superconductivitat Pel·lícules fines Fotònica Microwaves Crystals Superconductivity Thin films Photonics 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. 2012-05-03T07:53:36Z 2012-05-03T07:53:36Z 2002-11-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: http://dx.doi.org/10.1063/1.1515372 Journal of Applied Physics, 2002, vol. 92, núm. 10, p. 6346 http://dx.doi.org/10.1063/1.1515372 (c) American Institute of Physics, 2002 info:eu-repo/semantics/openAccess American Institute of Physics Articles publicats en revistes (Física Aplicada)