Synthesis and properties of TlBaCaCuO films prepared by spray pyrolysis method

Author

Naziripour, A. ; Duan, H.M. ; Sharp, J. ; Hermann, A.M. ; de Rochemont, L.P. ; Squillante, M. ; Zhang, J.G. ; Oakes, C.E. ; Parilla, P.A. ; Bhattacharya, R.N. ; Blaugher, R.D.

Author_Institution

Dept. of Phys., Colorado Univ., Boulder, CO, USA

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2235

Lastpage

2237

Abstract

The authors report on the fabrication, characterization, and transport properties of TlBaCaCuO (TBCCO) high-T_c superconducting films made from a low-cost, simple spray pyrolysis technique. This technique is applicable to the fabrication of large-area films for the design and fabrication of conformal superconducting coatings and large-area microwave devices. A high annealing temperature, close to the melting point of TBCCO, is needed in order to eliminate flaws, voids, and cracks. Measurements on the films showed relatively modest critical current densities. There was significant improvement in the critical current density by using an annealing temperature of approximately 895°C. At this temperature, the material melted partially and showed improved surface morphology

Keywords

annealing; barium compounds; calcium compounds; critical current density (superconductivity); pyrolysis; superconducting microwave devices; superconducting thin films; thallium compounds; 895 degC; TlBaCaCuO; annealing temperature; conformal superconducting; cracks; critical current densities; flaws; high-T_c superconducting films; large-area films; large-area microwave devices; spray pyrolysis method; surface morphology; transport properties; voids; Annealing; Coatings; Critical current density; Density measurement; Fabrication; Microwave theory and techniques; Spraying; Superconducting films; Superconducting microwave devices; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179454

Filename

179454