Title :
Initial Stages of Nucleation and Growth in MOD YBCO Films
Author :
Holesinger, Terry G. ; Li, Xiaoping ; Rupich, Martin W.
Author_Institution :
Supercond. Technol. Center, Los Alamos Nat. Lab., Los Alamos, NM, USA
fDate :
6/1/2009 12:00:00 AM
Abstract :
Key features of the nucleation and growth of metal organic deposited (MOD) Y1Ba2Cu3Oy (YBCO) films on biaxially-textured nickel substrates with intervening buffer layers are presented. Within this work, we show the formation of an oriented precursor phase, the laminar growth of the YBCO in the presence of a liquid phase, and subsequent formation of relevant defects tied to the growth process. A model is presented for nucleation and growth, second phase development, and porosity formation. Specific microstructural differences with regard to physical vapor deposited films are discussed.
Keywords :
MOCVD; barium compounds; buffer layers; grain size; high-temperature superconductors; nucleation; porosity; superconducting thin films; texture; yttrium compounds; MOCVD; YBa2Cu3Oy; biaxially-textured nickel substrate; buffer layers; grain size; laminar growth; metal organic deposited films; microstructure; nucleation; physical vapor deposited films; porosity; thin film growth; High-temperature superconductors; materials processing; microscopy; thick films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2009.2019193
