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Study of high-quality epitaxial YBCO thin films grown directly on Y-Cut LiNbO3 |
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| Authors: | P Tiwari X D Wu S R Foltyn R E Muenchausen P N Arendt I H Campbell Q X Jia D E Peterson T E Mitchell |
| Affiliation: | (1) Superconductivity Technology Center, Los Alamos National Laboratory, 87545 Los Alamos, NM;(2) Present address: Center for Materials Science, Los Alamos National Laboratory, 87545 Los Alamos, NM;(3) Present address: IBM Microelectronics, 1000 River St., 05452 Essex Junction, VT |
| Abstract: | Pulsed laser deposition was used to deposit high-quality YBa2Cu3O7-δ (YBCO) thin films directly on y-cut LiNbO3 substrates. The as-deposited YBCO films had a high degree of in-plane orientation and showed superconducting transition temperature (Tco) at 91K with a transition width of less than IK. Transport critical current densities were found to be ∼106 A/cm2 at 77K and zero field. An ion beam minimum channeling yield of 16% was obtained for YBCO films, indicating high crystallinity. High-resolution transmission electron microscopy studies showed that the interface between the film and the substrate was quite smooth and free from interfacial interdiffusion. The defects in thin films are also identified. The work showed that high-quality high Tc thin films can be deposited directly on LiNbO3. Novel devices based on the properties of both YBCO and LiNbO3 could be realized based on these results. |
| Keywords: | High resolution transmission electron microscopy (HRTEM) pulsed laser deposition YBCO |
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