SUPERCONDUCTING BA0.6K0.4BIO3 - THIN-FILM PREPARATION BY RF MAGNETRONSPUTTERING

Authors
HOU CJ STEINFINK H RABENBERG L HILBERT C KROGER H
Citation
Cj. Hou et al., SUPERCONDUCTING BA0.6K0.4BIO3 - THIN-FILM PREPARATION BY RF MAGNETRONSPUTTERING, Journal of materials research, 8(8), 1993, pp. 1798-1804
Citations number
16
Categorie Soggetti
Material Science
Journal title
Journal of materials research → ACNP
ISSN journal
08842914
Volume
8
Issue
8
Year of publication
1993
Pages
1798 - 1804
Database
ISI
SICI code
0884-2914(1993)8:8<1798:SB-TPB>2.0.ZU;2-L
Abstract
Superconducting Ba0.6K0.4BiO3 thin films with transition temperatures up to 25 K have been successfully grown on SrTiO3 substrates using RF magnetron sputtering and postgrowth oxygen annealing. Systematic varia tion of the sputtering process parameters showed that optimum films ca n be grown on substrates heated to 400-degrees-C in a 10 mTorr atmosph ere containing 96% Ar and 4% 02 and using a target containing Ba, K, a nd Bi in ratios of 0.6: 1.2: 1.4. High transition temperature supercon ductivity was observed only in highly oriented, crystalline films havi ng the ideal stoichiometry, Ba0.6K0.4BiO3.