Flux pinning distribution and E-J characteristics of 2G YBCO Tapes
Flux pinning distribution and E-J characteristics of 2G YBCO Tapes
E-J characteristics of SuperPower YBCO 2G tapes have been measured in the temperature range 15K-80K. It was found that the E-J characteristics deviate significantly from the standard power-law behaviour with apparent power exponent decreasing continuously at high voltage with increasing current. The deviation of E-J characteristic from the standard power-law was found to be consistent with a Weibull distribution of critical current. The identical scaling of E-J characteristics above 40K suggests a common critical current distribution. At lower temperature the critical current distribution becomes narrower to give higher apparent power exponent at lower temperature. With the critical current distribution model it is shown that the dissipation can be correlated directly to the flux flow resistance of Bardeen. The distribution of the critical current can be associated with a distribution of pinning potential of collective pinning and the headline pinning range is obtained as function of temperature
022004-[5pp]
Falorio, I.
65afc7a9-336b-4cce-a034-0c37df06e2c4
Young, E.A.
d3a881b0-a564-41f5-9843-34ae86da360f
Yang, Y.
4cac858a-e0c0-4174-a839-05ca394fc51f
2014
Falorio, I.
65afc7a9-336b-4cce-a034-0c37df06e2c4
Young, E.A.
d3a881b0-a564-41f5-9843-34ae86da360f
Yang, Y.
4cac858a-e0c0-4174-a839-05ca394fc51f
Falorio, I., Young, E.A. and Yang, Y.
(2014)
Flux pinning distribution and E-J characteristics of 2G YBCO Tapes.
Journal of Physics: Conference Series, 507, .
(doi:10.1088/1742-6596/507/2/022004).
Abstract
E-J characteristics of SuperPower YBCO 2G tapes have been measured in the temperature range 15K-80K. It was found that the E-J characteristics deviate significantly from the standard power-law behaviour with apparent power exponent decreasing continuously at high voltage with increasing current. The deviation of E-J characteristic from the standard power-law was found to be consistent with a Weibull distribution of critical current. The identical scaling of E-J characteristics above 40K suggests a common critical current distribution. At lower temperature the critical current distribution becomes narrower to give higher apparent power exponent at lower temperature. With the critical current distribution model it is shown that the dissipation can be correlated directly to the flux flow resistance of Bardeen. The distribution of the critical current can be associated with a distribution of pinning potential of collective pinning and the headline pinning range is obtained as function of temperature
Text
1742-6596_507_2_022004.pdf
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Published date: 2014
Organisations:
Engineering Science Unit
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Local EPrints ID: 377391
URI: http://eprints.soton.ac.uk/id/eprint/377391
ISSN: 1742-6588
PURE UUID: 30fbee20-4edf-49f8-bf90-960e1a59b99e
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Date deposited: 04 Jun 2015 09:04
Last modified: 15 Mar 2024 02:45
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I. Falorio
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