Melt processing of Bi-2212 on MgO and MgO-buffered substrates

Author

Naylor, M.J. ; Grovenor, C.R.M.

Author_Institution

Dept. of Mater., Oxford Univ., UK

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

1860

Lastpage

1863

Abstract

Bi-2212 thick films have been prepared by full and partial melt processing to investigate the suitability of MgO substrates in polycrystalline, single crystal and buffer layer formats. There is a marked difference in microstructural and electrical properties between thick films on polycrystalline and single crystal MgO substrates. This is attributed to the degree of interaction between the liquid phase and substrate during melting. The thickness of films on single crystal MgO substrates is an important consideration in the optimization of the superconducting transport properties.

Keywords

bismuth compounds; calcium compounds; high-temperature superconductors; melt texturing; strontium compounds; superconducting thin films; Bi-2212 thick films; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/; MgO; MgO substrates; electrical properties; high temperature superconductor; melt processing; superconducting transport properties; Annealing; Buffer layers; Crystal microstructure; Melt processing; Scanning electron microscopy; Sputtering; Substrates; Superconducting films; Temperature; Thick films;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.784820

Filename

784820