Preparation of YBa/sub 2/Cu/sub 3/O/sub y/ thick films on Y/sub 2/BaCuO/sub 5/:CeO/sub 2/ substrates by a diffusion process

Author

Cha, D. ; Jeung Gon Ko ; Lee, K. ; Iguchi, I.

Author_Institution

Dept. of Phys., Kunsan Nat. Univ., South Korea

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

1443

Lastpage

1446

Abstract

High density YBa/sub 2/Cu/sub 3/O/sub y/ thick films were prepared on Y/sub 2/BaCuO/sub 5/(211) substrates with CeO/sub 2/ additions by a surface diffusion process between Ba/sub 3/Cu/sub 5/O/sub y/ composite coating powder and a 211 substrate. It was found that small addition of CeO/sub 2/ from 0 to 0.5 wt% to the 211 substrate had a strong effect on the reaction between the Ba/sub 3/Cu/sub 5/O/sub y/ coating layer and the 211 substrate, which led to the crystallization of YBCO thick film grains without impurity phases such as CuO and unreacted Y/sub 2/O/sub 3/ particles along the grain boundaries. As CeO/sub 2/ additions were increased from 0 to 5 wt%, the density of 211 substrate increased up to 80-90% and the critical temperature and the critical current density of 123 thick films also increased.

Keywords

barium compounds; cerium compounds; high-temperature superconductors; superconducting thin films; surface diffusion; yttrium compounds; CeO/sub 2/ additions; Y/sub 2/BaCuO/sub 5/:CeO/sub 2/; Y/sub 2/BaCuO/sub 5/:CeO/sub 2/ substrates; YBa/sub 2/Cu/sub 3/O/sub 7/; YBa/sub 2/Cu/sub 3/O/sub y/ thick films; critical current density; crystallization; diffusion process; grain boundaries; high temperature superconductor; surface diffusion process; Coatings; Crystallization; Diffusion processes; Grain boundaries; Impurities; Powders; Substrates; Temperature; Thick films; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.620843

Filename

620843