Fabrication and post-annealing studies of ultrasonically spray pyrolysed Y-Ba-Cu-O films

Author

Ferreri, Annarita ; Nelstrop, John A G ; Caplin, Anthony D. ; MacManus-Driscoll, Judith L.

Author_Institution

Centre for High Temp. Supercond., Imperial Coll. of Sci., Technol. & Med., London, UK

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

2742

Lastpage

2745

Abstract

An ultrasonic spray pyrolysis (USP) system has been used to deposit thick films of YBa₂Cu₃O_7-x on (100) LaAlO₃. Nitrate precursors with a Y:Ba:Cu ratio of 1:2:0.6 have been used with a deposition temperature of 900°C and annealing temperature of 500°C. Growth rates as high as 1 μm per minute have resulted in epitaxial growth of biaxially aligned (<3°), 3 μm thick YBa₂Cu₃O_7-x films, with typical endpoint T_c of ~86 K and onset T_c of ~91 K and J_c, of >10⁴ A.cm^-2, 1 T, 77 K. It has been previously shown that lower nitrate precursor concentration, and hence decreased growth rate, has resulted in improved superconducting properties. The main objective of this paper is to investigated the effect of deposition temperature and post-annealing on the properties of the superconducting films

Keywords

annealing; barium compounds; critical current density (superconductivity); high-temperature superconductors; spray coatings; superconducting thin films; superconducting transition temperature; yttrium compounds; (100) LaAlO₃; 500 C; 900 C; 91 K; Y-Ba-Cu-O films; YBa₂₃O₇; YBa₂Cu₃O_7-x; annealing temperature; deposition temperature; fabrication; growth rates; high temperature superconductor; lower nitrate precursor concentration; post-annealing; superconducting properties; ultrasonically spray pyrolysed film; Annealing; Educational institutions; Epitaxial growth; Fabrication; Spraying; Superconducting epitaxial layers; Superconducting films; Telephony; Temperature; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919630

Filename

919630