[CCoE Notice] Master's thesis defense announcement

[Khator, Suresh]

Master's thesis defense that may be of interest to your graduate students.

Suresh Khator

_______________________________________________________
Suresh K. Khator, Ph.D., P.E.                         Phone: 713-743-4205
Associate Dean, College of Engineering    Fax: 713-743-4214
University of Houston                                     Email: skhator at uh.edu
E421 Engineering Bldg 2                                www.egr.uh.edu/ie
Houston, TX 77204-4008


A Systematic Study of Zirconium doping on REBa2Cu3O7-x (RE = Gd, Y) Films Grown by Metal Organic Chemical Vapor Deposition



By Jose Albert P. Guevara
November 16, 2010 at 9:30 a.m.



Abstract

Superconducting REBa2Cu3O7-x (REBCO; RE = Y, Gd, Nd, Sm) thin films show good properties in magnetic fields compared to other types of superconductors. These properties are further improved by introducing nanoscale defects into the film. One promising technique is the addition of BaZrO3 (BZO) nanoparticles. In this study, a reel-to-reel metal organic chemical vapor deposition system is used to deposit REBCO films from metal organic precursors to a LaMnO3-capped substrate. A systematic study of varying amounts of Zr doping at different growth rates was performed. It was determined that 7.5 mol% Zr shows the best in-field properties. Multilayers of high-Zr, medium-Zr and Zr-free layers show improved properties when the higher-Zr layer is on top of a lower-Zr layer. The improvement with Zr doping increases with thickness. Most of the measurements are done at 77 K in zero to 1 T magnetic field. X-ray diffraction, TEM and SEM aided microstructure analysis.



Committee Panel Members: Venkat Selvamanickam, Mechanical Engineering, Li Sun, Mechanical Engineering, Arnold M. Guloy, Chemistry
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://Bug.EGR.UH.EDU/pipermail/engi-dist/attachments/20101116/71d24e0e/attachment.html