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Current-voltage characteristics of Bi2Sr2Ca2Cu3O10+x/Ag multifiliamentary tapes in zero applied magnetic field

Current-voltage characteristics of Bi2Sr2Ca2Cu3O10+x/Ag multifiliamentary tapes in zero applied magnetic field
Current-voltage characteristics of Bi2Sr2Ca2Cu3O10+x/Ag multifiliamentary tapes in zero applied magnetic field
Current - voltage characteristics of multifilamentary Bi2Sr2Ca2Cu3O10/Ag tapes (short samples) produced by the 'powder in tube' technique were measured at different temperatures close to the mean-field critical temperature, and in zero applied magnetic field. After performing the required corrections due to the current flowing in the silver matrix, the I - V curves were interpreted in terms of current-induced unbinding of the thermally created vortex - antivortex pairs. Two possible mechanisms for appearance of a finite critical current in zero applied magnetic field are discussed: the Jensen - Minnhagen quasi-two-dimensional (2D) approach, that takes into account the interlayer Josephson coupling, and a model of size limitation of vortex fluctuations. From our analysis, it seems that the latter model is more suitable for this kind of superconducting material, due probably to an accentuated intrinsic anisotropy.
0953-2048
298-303
Crisan, A.
44bf9544-7340-46f9-bd2f-3495bbfbb111
Miu, L.
ec9c5fa0-92fb-48ba-b570-d5bd6004a71e
Popa, S.
c08675a7-c77c-49d5-aa38-b78cc5ca44cf
Yang, Y.
0c661323-7e23-41c6-a9a2-b4479fd74ef1
Beduz, C.
15245681-77b5-4b29-a8fc-23296f13bc57
Crisan, A.
44bf9544-7340-46f9-bd2f-3495bbfbb111
Miu, L.
ec9c5fa0-92fb-48ba-b570-d5bd6004a71e
Popa, S.
c08675a7-c77c-49d5-aa38-b78cc5ca44cf
Yang, Y.
0c661323-7e23-41c6-a9a2-b4479fd74ef1
Beduz, C.
15245681-77b5-4b29-a8fc-23296f13bc57

Crisan, A., Miu, L., Popa, S., Yang, Y. and Beduz, C. (1997) Current-voltage characteristics of Bi2Sr2Ca2Cu3O10+x/Ag multifiliamentary tapes in zero applied magnetic field. Superconductor Science and Technology, 10, 298-303. (doi:10.1088/0953-2048/10/5/006).

Record type: Article

Abstract

Current - voltage characteristics of multifilamentary Bi2Sr2Ca2Cu3O10/Ag tapes (short samples) produced by the 'powder in tube' technique were measured at different temperatures close to the mean-field critical temperature, and in zero applied magnetic field. After performing the required corrections due to the current flowing in the silver matrix, the I - V curves were interpreted in terms of current-induced unbinding of the thermally created vortex - antivortex pairs. Two possible mechanisms for appearance of a finite critical current in zero applied magnetic field are discussed: the Jensen - Minnhagen quasi-two-dimensional (2D) approach, that takes into account the interlayer Josephson coupling, and a model of size limitation of vortex fluctuations. From our analysis, it seems that the latter model is more suitable for this kind of superconducting material, due probably to an accentuated intrinsic anisotropy.

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Published date: 1997

Identifiers

Local EPrints ID: 21070
URI: http://eprints.soton.ac.uk/id/eprint/21070
ISSN: 0953-2048
PURE UUID: bdf51cb9-56a7-4379-bec9-e3ba17ba402b

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Date deposited: 30 Oct 2006
Last modified: 15 Mar 2024 06:27

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Contributors

Author: A. Crisan
Author: L. Miu
Author: S. Popa
Author: Y. Yang
Author: C. Beduz

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