Critical current in electrophoretically deposited thick films of YBCO superconductor

Thick films of YB 2Cu 3O 7 − δ (YBCO) superconductor have been prepared by the electrophoretic deposition technique using flexible silver strip as the substrate. Effects of several deposition parameters, e.g., time of deposition, particle size of the powder, number of layers deposited, etc., on the...

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Bibliographic Details
Published in:Materials letters 1993-06, Vol.16 (6), p.337-341
Main Authors: Bhattacharya, Dipten, Roy, S.N., Basu, R.N., Das Sharma, A., Maiti, H.S.
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Growth from solutions
Materials science
Methods of crystal growth
physics of crystal growth
Physics
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Summary:Thick films of YB 2Cu 3O 7 − δ (YBCO) superconductor have been prepared by the electrophoretic deposition technique using flexible silver strip as the substrate. Effects of several deposition parameters, e.g., time of deposition, particle size of the powder, number of layers deposited, etc., on the various properties of the films have been studied in detail. Microstructural investigation of the films indicates extensive grain growth and recrystallization phenomena particularly in films of large thickness. The microstructural morphology changes significantly as the thickness decreases. The transport J c (at 77 K, B=0) increases from ≈450 A/cm 2 for a film thickness of ∼ 65 μm to > 4000 A/cm 2 for a reduced thickness of ∼ 3 μm. Possible reasons for this dimensional dependence are discussed.
ISSN:0167-577X
1873-4979
DOI:10.1016/0167-577X(93)90204-B