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Percolative Transition and Scaling of Transport E-J Characteristics in YBCO Coated IBAD Tape.

Authors :
Kiss, T.
Inoue, M.
Egashira, S.
Kuga, T.
Ishimaru, M.
Takeo, M.
Matsushida, T.
Iijima, Y.
Kakimoto, K.
Saitoh, T.
Awaji, S.
Watanabe, K.
Shiohara, Y.
Source :
IEEE Transactions on Applied Superconductivity. Jun2003 Part 3 of 3, Vol. 13 Issue 2, p2607. 4p. 4 Black and White Photographs, 1 Diagram, 7 Graphs.
Publication Year :
2003

Abstract

We have investigated extended electric field-vs.-current density E-J characteristics in YBCO coated IBAD tapes. The results of a Monte-Carlo study on the depinning in a random pin medium were compared with measurements. Using a low temperature scanning laser microscope, we examined the percolative behavior of the local resistive transition in the YBCO tape. It was also shown that the depinning probability, which is proportional to the dynamic resistance of the E-J curves, is scaled as a function of reduced current density with the aid of a power index. Consequently, the E-J characteristics in the tapes can be described by the combination of the two kinds of scaling laws: one is the scaling law of the depinning probability predicted in a random network and the other is the scaling law for the flux pinning force. These properties agree well with the percolation model of depinned clusters. [ABSTRACT FROM AUTHOR]

Subjects

Subjects :
*THIN films
*CRITICAL currents

Details

Language :
English
ISSN :
10518223
Volume :
13
Issue :
2
Database :
Academic Search Index
Journal :
IEEE Transactions on Applied Superconductivity
Publication Type :
Academic Journal
Accession number :
10456664
Full Text :
https://doi.org/10.1109/TASC.2003.811906