Dissertation > Excellent graduate degree dissertation topics show

The Epitaxial Growth of C-axis Oriented YBa2Cu3O7-δ Films by Pulsed Laser Deposition and the Elimination of Laser-induced Particles

Author: FanJun
Tutor: ZuoFuQiang
School: Suzhou University
Course: Materials Physics and Chemistry
Keywords: YBCO films pulsed-laser deposition laser-induced particles gird mask c-axis preferential orientation
CLC: TB383.2
Type: Master's thesis
Year: 2011
Downloads: 41
Quote: 0
Read: Download Dissertation


The YBa2Cu3O 7 ?δ(YBCO) thin films are key materials for various electronic applications, such as Josephson junctions, SQUID, microwave devices, and so on. After decades of intensity studies, there are still few technique difficulties concerning its quality. For instance, there are numerous of laser-induced particles in YBCO films prepared by the pulsed-laser deposition (PLD); and the crystalline orientation of YBCO film is difficult to control. In this paper, we will focus on above two issues.First, PLD is a universal technique to prepare semiconductor, dielectric and high-Tc thin oxide films. However, one typical feature of these films is laser-induced particles on the surface of the film, which were originated from the superheating under the near surface of target. Therefore, we developed a method by inserting a grid-mask of suitable size and location between the substrate and the target to block the large particles. We observe the morphology of the film by the XRD, SEM and AFM measurement methods. The results showed that the final YBCO film is almost free of large-particles and the quality of the film is improved as expected.Second, we studied the phase content and microstructure of c-axis oriented films on the three of single-crystal substrates, i.e. MgO, SrTiO3 and Si, by optimizing of PLD parameters and using of YSZ(yttrium-stabilized zirconia)underlayer (for the Si substrate) and analyzed the mechanism of the relation between the deposition conditions and the quality of phase formation. The films were characterized by the XRD measurement method. After then, the epitaxial growth mechanisms of preferential orientation were discussed through the boundary energy theory and lattice matching theory.

Related Dissertations

  1. Iron-doped SnO \u003csub\u003e 2 \u003c/ sub\u003e ceramics and thin films research,TQ174.6
  2. Tailoring In-plane Crystallographic Orientation of Epitaxial YBa2Cu3O7-δ Thin Films Having Perpendicular C-axes Texture,TB383.2
  3. In-situ Epitaxial Growth of YBCO Thin Films and Its Orientation Controlling,O484.1
  4. And plasma immersion injected technology Modification of semiconductor materials,TN304
  5. Hypersonic the substrate piezoelectric thin films and surface acoustic wave devices developed to explore,TN65
  6. Analysis of Structural and Luminescent Properties of ZnO Thin Films Grown by PLD,O484.41
  7. Pulsed laser deposition of ZnO fluorescent film,O484.1
  8. Studies on Growth and Doping of ZnO Thin Films by PLD,O484
  9. PLD Preparation and optoelectronic properties of perovskite oxide films,O484
  10. Film Preparation and First-Principles Studies of Cathode Materials LiCoO2 for Li-ion Batteries,TM912
  11. Study on Thickness Uniformity of Large Area DLC Thin Films Deposited by Femtosecond Pulsed Laser,TN249
  12. Preparation and Properties of Ce1Y2Fe5O12 and HfxZn1-xO Films,TN304.05
  13. Some applications of the ECR plasma assisted pulsed laser deposition of thin films,O484
  14. Eu ~ (3), Li ~ co-doped ZnO thin film structure and the nature of the research,O484.1
  15. ZnO Doped Co-Based Diluted Magnetic Semiconductors by Pulsed Laser Deposition,TN304.21
  16. Preparation and Performance Study of ZnO Based Transparent Conductive Thin Film on Flexible Substrate,O484.1
  17. Deposition and Analysis of ReBa2Cu3O7-δ Thin Films,O484.1
  18. Prepared by Pulsed Laser Deposition and Properties of ZnS films,O484.1
  19. Study of the Novel Preparation Methods of Supported Metal Catalyst,O643.32
  20. Preparation and Properties of Ag-doped and Fe-Doped Zinc Oxide Films,O484
  21. Silica film and its light-emitting properties of nanocrystalline silicon mosaic,O484.41

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
© 2012 www.DissertationTopic.Net  Mobile