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

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

3156

Lastpage

3159

Abstract

Key features of the nucleation and growth of metal organic deposited (MOD) Y₁Ba₂Cu₃O_y (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; YBa₂Cu₃O_y; 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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2019193

Filename

5153221