Effects of deposition conditions on the phase formation of YBCO films prepared by spray pyrolysis method
| Autor: | Ho-Jin Kim, Gye-Won Hong, Jinho Joo, Sun-Weon Lim, Shin-Geun Park, Suck-Kwan Hong, Hee-Gyoun Lee, Sun-Wang Lee |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element Substrate (electronics) Partial pressure Condensed Matter Physics Epitaxy Microstructure Oxygen Electronic Optical and Magnetic Materials chemistry Texture (crystalline) Electrical and Electronic Engineering Single crystal Deposition (law) |
| Zdroj: | Physica C: Superconductivity and its Applications. :598-602 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2006.04.086 |
| Popis: | YBa 2 Cu 3 O y superconducting films were deposited on LaAlO 3 (1 0 0) single crystal substrates by spray pyrolysis method. Two types of ultrasonic and concentric nebulizer were used in order to generate fine droplets of metal-inorganic precursor solution. c -Axis oriented films were obtained at deposition temperature of 750–850 °C and at working pressures of 100 Torr and 500 Torr. In case of ultrasonic nebulizer, the films showed rough surface morphology due to the presence of enormous droplets, whereas smooth and dense films were obtained for concentric nebulizer. The good c -axis oriented YBCO films were formed at the wide range of the oxygen partial pressure. Oxygen which is generated via the decomposition of nitrate precursors is considered to participate in the formation reaction of YBCO film. Microstructures of YBCO films varied depending on oxygen partial pressure and rod-like grains were appeared when the oxygen partial pressure was lower than 30 Torr. YBCO films were deposited epitaxially on LAO(1 0 0) substrate. Δ ϕ of in-plane and Δ ω of out-of-plane texture were measured as 3.3° and 1.0°, respectively. A transport J c value of 0.50 MA/cm 2 at 77 K and self-field was achieved for the YBCO film deposited on LaAlO 3 (1 0 0) single crystal substrate. |
| Databáze: | OpenAIRE |
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