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Multiple heteroepitaxy and superlattice formation of LnBaCuO/YBaCuO system

Conference · · IEEE Trans. Magn.; (United States)
OSTI ID:6089944
Multiple heteroepitaxy and superlattice formation of high Tc superconducting films were demonstrated. Both structures of LnBaCuO (Ln=Er, Nd) / YBaCuO system were realized as a preliminary stage. Furthermore, the superlattice formation made it clear that the crystal structure of the system strongly depends on the substrate materials. A (100) oriented single crystal MgO substrate provided the superlattice with the sound perovskite structure whereas, on a (110) SrTiO/sub 3/ wafers, the deformed crystal was formed. The close study of the ultrathin YBaCuO film epitaxy revealed that some kind of crystal, deformed from the pervoskite structure but not identified yet, was found to grow on SrTiO/sub 3/ wafers regardless of their orientation at the beginning of the deposition whereas the ultrathin perovskite crystal epitaxially grew on (100) MgO substrate. In addition to the above study, MgO thin film epitaxy on NdBaCuO was examined. RHEED patterns revealed that MgO epitaxially grew on both (110) oriented YBaCuO and SrTiO/sub 3/ with the orientation of (100) and (110), respectively.
Research Organization:
4969400
OSTI ID:
6089944
Report Number(s):
CONF-880812-
Conference Information:
Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 25:2
Country of Publication:
United States
Language:
English

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