Superconducting Nd1.85Ce0.15CuO4-y (NCCO) thin films have been made on Yttria-Stabilized Zirconia(YSZ) buffered sapphire. The films are epitaxially grown and highly in-plane oriented. X-ray diffraction shows the c-axis of the film normal to the surface of the substrate. The width of rocking curve is 0.2° and the RBS channeling yield is 9%, indicating high crystallinity of the film. Cross-sectional transmission electron microscopy images reveal a sharp interface between NCCO and YSZ. The microwave surface resistance of NCCO films on YSZ buffered sapphire at 9.6 GHz was measured and a value of 80 µΩ (at 4.2 K in zero dc magnetic field) was obtained, which is comparable to Y1Ba2Cu3O7_y (YBCO) films at the same reduced temperature. A trilayer structure of YBCO/SrTiO3/ NCCO on YSZ buffered sapphire has been fabricated with all layers oriented, in which both the YBCO and NCCO layers are superconducting.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering