Influence of the deposition rate on crystalline structure and cation disordering of YBCO thin films

Author

Jeong Dae Suh ; Gun Yong Sung ; Kwang Yong Kang

Author_Institution

Electron. & Telecommun. Res. Inst., Daejeon, South Korea

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

1708

Lastpage

1711

Abstract

We have systematically investigated the superconducting properties of in-situ deposited YBCO thin films as a function of the substrate temperature in the range 650-800/spl deg/C and the deposition rate in the range 0.1-12.2 nm/s. It was found that the cubic structure of YBCO grows at low substrate temperatures and high deposition rates. Also, expansion of the c-lattice parameter and decrease of the critical temperature of YBCO thin films were observed with decreasing substrate temperature and increasing deposition rate, suggestive of cation disordering in the YBCO thin films. These results are explained by cation kinetics.

Keywords

barium compounds; crystal structure; high-temperature superconductors; lattice constants; superconducting thin films; superconducting transition temperature; yttrium compounds; 650 to 800 degC; YBa/sub 2/Cu/sub 3/O/sub 7/; c-lattice parameter; cation disordering; cation kinetics; critical temperature; crystalline structure; cubic structure; deposition rate dependence; substrate temperature dependence; superconducting properties; thin films; Crystallization; Optical pulses; Pulsed laser deposition; Sputtering; Substrates; Superconducting films; Superconducting thin films; Temperature; Transistors; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.784782

Filename

784782