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YBCO Thin Film Fabrication by Chemical Method, Characterizations and Optimization for Device Applications

Hosseini, Mehdi | 2011

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 43005 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Vesaghi, Mohammad Ali; Fardmanesh, Mehdi
  7. Abstract:
  8. The Pulse Laser Deposition (PLD), Sputtering, Evaporation and Metal-Organic Chemical Vapor Deposition are the common methods for thin film fabrication. The mentioned methods are very costly for commercials application. Due to the importance of cost in large thin film fabrication, scientist tried to find a low-cost method. The low-cost non-hazardious Metal Organic Deposition (MOD), method which is based on chemical manufacturing method was developed. The type of the solvent and removal the destructive residual materials are the main challenge in this method. In this project, by utilizing acetyl acetone method, high quality MOD YBCO superconducting thin film has been fabricated and will be reported. Several characterizations such as resistance versus temperature (in 77-300 Kelvin range), the critical current measurements of samples in liquid nitrogen, optical microscopic and Scanning Electron Microscope (SEM), X ray scattering (XRD) and thickness measurement have been done. Balometer device with high detection based on high quality thin film have been designed and characterized. In addition, the CeO2 buffer layers for fabrication of high-quality samples with very sharp transition (0.37 Kelvin transition width) width and very high critical current by MOD method have been fabricated
  9. Keywords:
  10. Metal Organic Deposition (MOD) ; Device Applications ; High-Quality Thin Film

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